diff --git a/package-lock.json b/package-lock.json
index 2d46c47..3e672ae 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,7 +23,8 @@
         "radash": "^12.1.0",
         "url": "^0.11.4",
         "vue": "^3.5.13",
-        "vue-router": "^4.5.0"
+        "vue-router": "^4.5.0",
+        "zod": "^3.25.55"
       },
       "devDependencies": {
         "drizzle-kit": "^0.30.6",
@@ -13202,12 +13203,10 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.24.2",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.24.2.tgz",
-      "integrity": "sha512-lY7CDW43ECgW9u1TcT3IoXHflywfVqDYze4waEz812jR/bZ8FHDsl7pFQoSZTz5N+2NqRXs8GBwnAwo3ZNxqhQ==",
+      "version": "3.25.55",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.55.tgz",
+      "integrity": "sha512-219huNnkSLQnLsQ3uaRjXsxMrVm5C9W3OOpEVt2k5tvMKuA8nBSu38e0B//a+he9Iq2dvmk2VyYVlHqiHa4YBA==",
       "license": "MIT",
-      "optional": true,
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/package.json b/package.json
index b5e50c4..254ce60 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,8 @@
     "radash": "^12.1.0",
     "url": "^0.11.4",
     "vue": "^3.5.13",
-    "vue-router": "^4.5.0"
+    "vue-router": "^4.5.0",
+    "zod": "^3.25.55"
   },
   "devDependencies": {
     "drizzle-kit": "^0.30.6",
diff --git a/pages/index.vue b/pages/index.vue
index 8c684b3..cb9693d 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -1,5 +1,4 @@
 <script setup lang="ts">
-import { diff, omit } from "radash";
 import { trackEvent } from "@aptabase/web";
 
 useHead({ title: "Ghostwriter" });
@@ -14,24 +13,23 @@ interface FormData {
   enabled: boolean;
   language: string;
   units: string;
+  tone: string[];
 }
 
 const preferences = useState<FormData>("preferences", () => ({
   enabled: false,
   language: "English",
   units: "Metric",
+  tone: [],
 }));
 
-const { status } = useFetch("/api/preferences", {
-  onResponse({ error, response }) {
-    if (error) {
-      return;
-    }
-
-    preferences.value = omit(response._data, ["tone"]) as FormData;
-  },
+const { data, status } = useFetch("/api/preferences", {
+  lazy: true,
 });
 
+// @ts-expect-error typing issue - missing transform
+syncRef(data, preferences, { direction: "ltr", deep: true });
+
 onMounted(() => {
   saveOp.resume();
 });
@@ -40,7 +38,7 @@ const saveOp = watchPausable(
   preferences,
   async (newData) => {
     trackEvent("update_preferences", {
-      ...newData,
+      enabled: newData.enabled,
     });
 
     await $fetch("/api/preferences", {
@@ -75,7 +73,9 @@ const saveOp = watchPausable(
     <div class="font-bold text-lg">❤️ Support</div>
     <UCard class="">
       <div class="flex flex-col gap-8">
-        Ghostwriter 👻 is free to use, but it takes time and resources to keep it running smoothly. If you enjoy it, consider supporting the app and its creator - every bit helps!
+        Ghostwriter 👻 is free to use, but it takes time and resources to keep
+        it running smoothly. If you enjoy it, consider supporting the app and
+        its creator - every bit helps!
       </div>
       <template #footer>
         <ULink href="https://buymeacoffee.com/mariosant" target="_blank">
@@ -133,6 +133,22 @@ const saveOp = watchPausable(
             />
           </template>
         </CardField>
+
+        <CardField>
+          <template #title> Tone </template>
+          <template #description>
+            Choose one or more writing styles you like.
+          </template>
+          <template #value>
+            <USelect
+              multiple
+              class="min-w-28 max-w-64"
+              v-model="preferences.tone"
+              :items="tones"
+              placeholder="None specified (Use all)"
+            />
+          </template>
+        </CardField>
       </div>
     </UCard>
   </UContainer>
diff --git a/server/api/preferences.put.ts b/server/api/preferences.put.ts
index d0577e9..6708f1f 100644
--- a/server/api/preferences.put.ts
+++ b/server/api/preferences.put.ts
@@ -1,7 +1,22 @@
+import * as z from "zod";
+import {
+  availableLanguages,
+  availableTones,
+  availableUnits,
+} from "~/shared/constants";
+//
+const bodySchema = z.strictObject({
+  enabled: z.boolean(),
+  language: z.enum(availableLanguages),
+  units: z.enum(availableUnits),
+  tone: z.array(z.enum(availableTones)),
+});
+
 export default defineEventHandler(async (event) => {
   const session = await requireUserSession(event);
+  const body = await readValidatedBody(event, (body) => bodySchema.parse(body));
+
   const db = useDrizzle();
-  const body = await readBody(event);
 
   const [preferences] = await db
     .update(tables.preferences)
@@ -10,6 +25,7 @@ export default defineEventHandler(async (event) => {
         enabled: body.enabled,
         language: body.language,
         units: body.units,
+        tone: body.tone,
       },
     })
     .where(eq(tables.preferences.userId, session.user.id))
diff --git a/server/database/schema.ts b/server/database/schema.ts
index 9dabc0c..0e36e4f 100644
--- a/server/database/schema.ts
+++ b/server/database/schema.ts
@@ -33,11 +33,13 @@ export const preferences = pgTable("preferences", {
       enabled: boolean;
       language: string;
       units: "Imperial" | "Metric";
+      tone?: string[];
     }>()
     .$defaultFn(() => ({
       enabled: true,
       language: "English",
       units: "Metric",
+      tone: [],
     })),
 });
 
diff --git a/server/utils/create-content.ts b/server/utils/create-content.ts
index 0a12b95..7a1179a 100644
--- a/server/utils/create-content.ts
+++ b/server/utils/create-content.ts
@@ -1,6 +1,7 @@
-import { chain, draw, get, omit, pick, tryit } from "radash";
+import { chain, draw, get, isEmpty, omit, pick, tryit } from "radash";
 import { safeDestr } from "destr";
 import { User } from "./drizzle";
+import { availableTones } from "~/shared/constants";
 
 const promo = "Written by https://ghostwriter.rocks 👻";
 
@@ -111,18 +112,13 @@ export const createActivityContent = async ({
 }: {
   currentActivity: Activity;
   previousActivities: Activity[];
-  user: User & { preferences: any };
+  user: User & { preferences: Preferences };
 }) => {
   const openai = useOpenAI();
 
-  const tone = draw([
-    "casual",
-    "funny",
-    "epic",
-    "poetic",
-    "reflective",
-    "snarky",
-  ]);
+  const tone = isEmpty(user.preferences.data?.tone)
+    ? (draw(availableTones) as string)
+    : draw(user.preferences.data!.tone!);
 
   const length = draw([
     "short",
@@ -135,7 +131,7 @@ export const createActivityContent = async ({
   const prompt = `
     Generate a short title and a ${length}-lengthed description for my strava activity. Use my preferred language and unit system.
     Try to not exaggerate as I am using Strava often and I want my activites to be unique and easy to read. Don't say things like nothing too fancy or wild.
-    Use a little bit of ${tone} to make things less boring. Highlight any PR only if available, do not mention them if no PRs.
+    Use a little bit of ${tone} tone to make things less boring. Highlight any PR only if available, do not mention them if no PRs.
     Maybe comment if any interesting fact in comparison to previous activities.
 
     Add #${tone} at the end of the description. Depending the length of the description, maybe add more hashtags.
diff --git a/server/utils/drizzle.ts b/server/utils/drizzle.ts
index 4a4f763..5629164 100644
--- a/server/utils/drizzle.ts
+++ b/server/utils/drizzle.ts
@@ -12,4 +12,5 @@ export function useDrizzle() {
 }
 
 export type User = typeof schema.users.$inferSelect;
+export type Preferences = typeof schema.preferences.$inferSelect;
 export type Tokens = typeof schema.tokens.$inferSelect;
diff --git a/shared/constants.ts b/shared/constants.ts
new file mode 100644
index 0000000..e881171
--- /dev/null
+++ b/shared/constants.ts
@@ -0,0 +1,24 @@
+export const availableTones = [
+  "Adventure",
+  "Casual",
+  "Competitive",
+  "Epic",
+  "Funny",
+  "Minimalist",
+  "Motivational",
+  "Poetic",
+  "Reflective",
+  "Snarky",
+  "Witty",
+] as const;
+
+export const availableLanguages = [
+  "English",
+  "Greek",
+  "German",
+  "Italian",
+  "Polish",
+  "Spanish",
+] as const;
+
+export const availableUnits = ["Imperial", "Metric"] as const;
diff --git a/utils/model.ts b/utils/model.ts
index 8218675..23e7b55 100644
--- a/utils/model.ts
+++ b/utils/model.ts
@@ -1,23 +1,11 @@
-export const languages = ref([
-  "English",
-  "Greek",
-  "German",
-  "Italian",
-  "Polish",
-  "Spanish",
-]);
+import {
+  availableLanguages,
+  availableTones,
+  availableUnits,
+} from "~/shared/constants";
 
-export const tones = ref([
-  "Motivational",
-  "Casual",
-  "Funny",
-  "Epic",
-  "Minimalist",
-  "Reflective",
-  "Poetic",
-  "Competitive",
-  "Adventure",
-  "Snarky",
-]);
+export const languages = ref(availableLanguages);
 
-export const units = ref(["Imperial", "Metric"]);
+export const tones = ref(availableTones);
+
+export const units = ref(availableUnits);