UTK = the University of Tennessee in Knoxville.
Tough to assess schools based on a type of personality (introvert). My best guess is that you might want to avoid small schools that have both a high percentage of athletes and high participation in Greek social societies. in short, avoid schools which facilitate cliques.
The larger the school, the more likely that you will find people and activities with which you are comfortable.
Better to focus on your major than on your personality in my opinion.