Demetrius and Marnie.
I'm basically a Demetrius in real life, so I figure we would quickly learn to accept each other's weird and not be offended by tomatoes classified as fruit (I actually thought Demetrius was being charming and funny by buying the tomatoes, but Robin got so furious...)
Marnie, because she's incredibly sweet, open, caring and loving towards animals, and brave to jump in a new relationship head-first and accept the needs of the other. I wish I WERE her.
Also, not so much a favorite as someone I feel a lot of affinity with, Clint. I have a social phobia too (not online thankfully...) and I admire his resolve to fight it and go out to the pub most nights, even if he can't really talk to people yet.