Ah hell, you did not just post this thread. Really? You did? OH, you did? Seriously! Wow! Uh... Ok.
Makise Kurisu - Steins;Gate
Orihime Inoue - Bleach
Kogorou Ran - Detective Conan
Himeji Mizuki - Baka to Test to Shoukanjuu
Gasai Yuno - Mirai Nikki
Nakamura Yuri(ppe) and Shiina - Angel Beats!
Black Rock Shooter - Black Rock Shooter (Coming soon anime)
Furukawa Nagisa - Clannad
Fenette Shirley and C.C. - Code Geass
Kubrick Fear - C³ or CubedxCursedxCurious
El Bridget Satellizer - Freezing!
Ushiromiya Maria - Umineko no Naku Koro ni
Ryuuguu Rena - Higurashi no Naku Koro ni
Katsura Kotonoha - School Days
Sakihata Rimi - Chaos;Head
Akiyama Mio and Hirasawa Yui - K-On!
Dunois Charlette - IS: Infinite Stratos
Shana - Shakugan no Shana
Fuyou Kaede - Shuffle!
Ika Musume - Shinryaku! Ika Musume
Ikaros - Sora no Otoshimono
Inami Miharu and Yamada Aoi - Working!!
Valliere Louise - Zero no Tsukaima
And many more, that I cannot think of at the moment. Now see what you made me type LOL. Btw, I just typed down any girl I could think of, it's NOT listed as my favorite to least favorite. I will have a hard time doing that XD.
@Mozared: Go Just like you not many on my list, but if I had to choose any girl from pokémon I'd say Jessy, Misty is simply a small annoying girl. And just to add more names to this list: Android 18 from Dragonball Z. Damn Kuririn you're so lucky! :-D