Not only do I get completely sucked into a new fandom about every other month, I invariably fall completely in love with an OTP. I've gotten a little better, sometimes I have multiple OTPs within a fandom, but I really get attached to certain pairings. Also, I think the solution to any love triangle is a threesome.
Bandom: Fall Out Boy
Patrick/Pete
Gossip Girl
Dan/Blair
Dan/Chuck
Jenny/Chuck
Chuck/Blair
Star Trek
Kirk/McCoy
Spock/Uhura
Torchwood
Jack/Ianto
Jack/Gwen/Ianto