I don't feel comfortable singling out a top five out of all my online pals. So I'll just say that if my top online buds are anyone who has exchanged more than 5 PMs in a row with me.
Yeah. Alla you people can feel the love. But the rest of you...well, go hug a teddy bear. Then multiply that feeling by a million. Then you can feel the kind of love they get.
EDIT: Y'know what? I'm going to contradict myself right now. I think ShockValue gets a special mention, since he's kept me entertained on Steam for many hours, and has gifted me two games.
He gets some major love.