I don't think any of my characters are all that much like me, actually.
Heavy Metal was the first character I brought into game. We both have a dirty mouth, a love of vodka and a love of, you know, heavy metal music. But that's about it. She's a lot more outspoken then I am - in fact all of my characters are, when I think about it. They all sort of say what they mean and in real life I am the worst little avoider of all confrontation.
Ate has a lot more shoes than I do but I'd love to have that. (Alas my feet are huge and my wallet is ever empty, so no designer sexy for me.) I also don't kill people... much. In real life I tend to call everyone by terms of endearment so Ate sort of got that, but just to a more extreme degree. Oh, and we both really love Mexican food.
Briseis gets all my feminist rage which is awesome cause god knows I love an outlet to rant about things like rape culture and sexual objectification and sexual discrimination. Briseis makes my gender studies major very very happy.
Rohypnol is probably the least like me of all of them and kind of makes me ill to write for sometimes because she's just so very misogynistic that I almost can't stand it. But it's fun in a really horrible way.
Fashion was supposed to be awesome because I have mad and shallow love for all things related to it/her but it's turned out kind of lame because while I spend too much time looking at pretty things I never feel I'm enough of an actual expert to write much from her. Frustrating >_