My favorites:
Hinosaka Mitoko (Sekdai de Ichiban Damena Koi)
Others I loved:
Hisasaki Komomo (Hoshizora no Memoria)
Mizuki Wakana (Gunjou no Sora wo Koete)
Tohno Akiha (Tsukihime)
Others I liked:
Caska (Berserk)
Christiane Friedrich (Maji de Watashi ni Koi Shinasai)
Eleonore von Wittenburg (Dies Irae)
Eris Floralia (Aiyoku no Eustia)
Foxbatt (Cannonball)
Kaego Oonishi (Texhnolyze)
Layla Hamilton (Kaleido Star)
Narusegawa Naru (Love Hina)
Natalia Lanvaldear (Tales of the Abyss)
Oki Kiki (Sumaga)
Sanada Akihiko (Persona 3)
Sugiura Koharu (White Album 2)
Venis (Kimi ga Aruji de)
Visual novel & other stuff impressions 