With "bad simming behaviors", I mean things that you do in your games that hinder you in getting out the best of the game's content. For me, it's the fact that I always, since TS3, think up the story ...
Right now I always get thrilled with pregnancy and finding out what my sims are going to have. But then I end up with a million toddlers in my rotational play and I don't want to play it anymore.