# Personality Matters: User Traits Predict LLM Preferences in Multi-Turn Collaborative Tasks

## TL;DR

This study investigates how different user personality traits influence preferences for specific LLMs in multi-turn collaborative tasks, revealing significant personality-driven model preferences that traditional evaluations overlook.

## Contribution

It demonstrates that user personality traits significantly affect LLM preferences, highlighting the importance of personalized model selection in collaborative AI applications.

## Key findings

- Rationals prefer GPT-4 for goal-oriented tasks
- Idealists favor Claude 3.5 for creative and analytical tasks
- Personality-driven preferences vary across task types

## Abstract

As Large Language Models (LLMs) increasingly integrate into everyday workflows, where users shape outcomes through multi-turn collaboration, a critical question emerges: do users with different personality traits systematically prefer certain LLMs over others? We conducted a study with 32 participants evenly distributed across four Keirsey personality types, evaluating their interactions with GPT-4 and Claude 3.5 across four collaborative tasks: data analysis, creative writing, information retrieval, and writing assistance. Results revealed significant personality-driven preferences: Rationals strongly preferred GPT-4, particularly for goal-oriented tasks, while idealists favored Claude 3.5, especially for creative and analytical tasks. Other personality types showed task-dependent preferences. Sentiment analysis of qualitative feedback confirmed these patterns. Notably, aggregate helpfulness ratings were similar across models, showing how personality-based analysis reveals LLM differences that traditional evaluations miss.