What Sim character trait is most important to you, and why?

I love a lot of them, but negative ones usually make the Sims most fun to play. I currently like erratic, evil and loner the most. I guess my all time favorite is erratic.
My mind changes a lot on what traits I like the most. Loves outdoors is a great one also because I have a lot of gardener Sims.
Nowadays I most often randomize the traits when my Sims age up in game. It's fun to get some weird trait combinations.