With a good system, you can get very handsome odds with blackjack. A solid betting strategy and the ability to keep track of the cards you've seen (not card counting per se, but to at least have a general idea of wether the deck is with or against you) can take you far in blackjack.

Craps also has better odds for the player, with less of it hinging on strategy and skill than blackjack.

Slots are cash machines stuck in reverse. :)

Me, I play horses.