Normals are my favorite for the girls, they're just so sweet. I love the peppies too though. And the only personality I really like for the boys is lazy-- cranky isn't bad, but jocks are annoying and to be totally honest, I don't like smugs either.
Snooty and Cranky are my favorite 2. I find their personality humorous and entertaining despite how they are meant to be perceived as vicious and rude. It helps too that I have 3 snooties and 2 crankies because I don't have the heart to let them to move away, despite the numurous times they've asked too!