Kara/Space.  Kara is my absolute favorite when she’s just out in a Viper (or the Blackbird) kicking ass and saying snarky things over the com.  I frequently see Kara/Lee as a sibling relationship.  I love Kara/Sam, although I’m in the middle of rewatching the show and Sam is currently still on Caprica and who I like tends to shift with the show’s focus.

In terms of non-romantic relationships, Starbuck + Papadama (making up words as I go) is my absolute favorite.  I LOVE them.