Blaine & Giovanni
Blaine 'cause he was a fire type gym leader (Love his Arcanine!), and I kind of liked his personality (And I liked how in the anime he was obsessed with riddles)
I like Giovanni because he was just bad ass...He was a villain that I loved to hate. He was evil, but somehow he earned my respect.
Other ones I liked where: Morty, Chuck, Norman, Volkner (I'm not too sure on the spelling...)