I like
Haruhi from Ouran High School Host Club, just because she's not the standard -too-cute-to-be-true character.
I like 'cool' and 'intelligent' types too, so from the same series Kyouya and from Full Metal Alchemist Edward. I liked the doctor from Fruit's Basket too.
I'm really sensitive for voices. Vegeta immediatly drawed my attention, and also Vampire Hunter D (in the first movie, his English voice was beautiful).
My favourite Rozen Maiden Character is Shinku, but Jun and Nori.
Nori is the surprising kind of character, very sweet, but wow, she is able to explode!