My favorites:
Others I loved:
Hayama Mizuki (ef -fairy tale of the two-)
Kurayashiki Tai (Akatsuki no Goei)
Matsushima Michiru (Grisaia no Kajutsu)
Sonohara Mayu (MinDeaD BlooD)
Others I liked:
Akane (Kono Aozora ni Yakusoku wo)
Harima Kenji (School Rumble)
Iori Junpei (Persona 3)
Izumi Kozue (Infinite Ryvius)
Kogasaka Chinami (Hoshizora no Memoria)
Kouda Ai (Ore-tachi ni Tsubasa ha nai)
Makimachi Misao (Rurouni Kenshin)
Sonohara Youhei (Clannad)
Tsukamoto Tenma (School Rumble)
Yagami Koko (Ever17)
Visual novel & other stuff impressions 