100% Shirayuki Mizore from Rosario + Vampire.
I fell in love with her character immediately and her hair. To this day I still fall in love with characters that don't talk much and have blue/purple hair. (Exceptions being Charlotte Dunois and Kirino Kousaka)
I think my first anime "crush" was Rukia Kuchiki from Bleach. I really cannot recall any other anime girls from long ago I can say I was attracted to. Perhaps Motoko Kusanagi from GITS:SAC, but being a cyborg is a little off-putting.
Well, Ryoko from Tenchi Muyo, and then Botan from YuYu Hakusho because she reminded me of Ryoko (lol). I also had big crushes on Marlene from blue gender, Hilda and Melfina from outlaw star, and Faye Valentine from cowboy bebop. That was all pretty early in my life I guess, but I haven't had an actual crush or anything since then I don't think.
"The individual has always had to struggle to keep from being overwhelmed by the tribe. If you try it, you will be lonely often, and sometimes frightened. But no price is too high to pay for the privilege of owning yourself."