I have to say I'm partial to the cheetah. But that could partly be because the pose is the most interesting to me. Then again, I am a cat person. Anyway, I think it's nicely shaded, more than the others. In the end, though, I think what counts is which one represents you the best, or portrays what you want to about yourself (which could be as little as possible, it's all up to you). Cool stuff, anyway.

I don't know you as a person, but I must say I like the weasel! I think it might be the insane firey-ness. But the cheetahs cute too. Heck, all of them look great! But I have to agree with jinx' comment, that you should choose the one YOU feel most comfortable with as representing you. Great pic(s)!