What trait(s) do you use the most?

Geek, Music Lover and Creative i use them on most sims as i feel those are the ones that best describe me as well

I use neat, good and family-oriented a lot but if I'm giving one of my sims' kids a different personality then I'll use weird ones but the Loner trait is so annoying because my sims hates talking to people

I end up using Good, Romantic, Creative, Bookworm, and Hot-Headed alot

There's a also a difference in what traits you give your "main" and what you give their partner (if you tailor make one):
I would never give my main sim "Neat" for example, but having a love interest / self employed "Maid" that keeps cleaning everything? Why not! Have fun!

Ambitious. I have way too many work-a-holic sims.

I use "ambitious" a lot because I like my sims to progress quickly in their careers (I play without money cheats). I also tend to use "family orientated" for the first generation of a family because I like to have a lot of kids.

I tend to use cheerful/playful a lot. Also athletic, loves outdoors, creative, nerd.

The only “negative” trait I use a lot is loner, just because I feel like that is “introvert” and it plays in my story a lot.