I'd be up for a 5v5 BL match, but I wouldn't at the same time due to team in-balance.
I'm really picky with teams, I really don't enjoy playing with people at extremely low skill caps, though that's probably because I've played the game for a few years (4?).
I'm not much of an elitist but I get extremely pissed off at people who don't work together as a team.