Before I started college, I was mostly like Yukiho, because yes, I was scared of boys and tended to be on the shy side.
Nowadays, I'm somewhat more mature and think of myself as more like Ritsuko, for my attention to detail, obsessive need to organize, and glasses fashion sense.
Either way, when I'm around friends (or at my job, for that matter), I find that I seem an awful lot like Yayoi. 200 PERCENT GENKI!!!