There are two rules to keep in mind whe picking a blackjack game. First; a standard game of blackjack has a lower house edge than any exotic ruled blackjack being offered. So before you try that new fancy blackjack game being offered make sure to check the rules of the game.
Second; Make sure your blackjack play uses basic strategy and that you are picking the table that has the right mix of rules that offers the lowest house edge possible.