I'd probably have to say Fry as well, he just is very genuine, cares about his friends. Bender is also pretty great for a laugh.

All of them...even, like, mop bucket...and Cartridge bot... and the turtle!

Leela, and not because I had a crush on her as a kid.

She's strong no nonsense, but pigheaded enough to make mistakes. Still, her heart is always in the right place.

Probably Scruffy, the janitor.