I've never had luck at roulette. On the night I just mentioned, I started out a a roulette table and lost my buy-in in 8 spins, and was playing the table minimum. It was rough.
Craps has such a high variance so you can also lose quickly, but then turn around and win quickly too. It can get pretty exciting a lot of times. Someone hit a 5 point fire bet, and it was just as exciting if not more than when friends of mine hit back to back numbers on the wheel.