Texas Hold-em
Omaha
Stud
All variations from Limit to no limit, they all need a different approach because in Limit games you don't find too many players trying to steal pots or bluff too often, the majority of the time to call a persons bluff it is only going to cost one bet, so bluffing becomes pointless.
What my the favorite Poker games?!. Hm, I think, NL Hol'dem, of course, Pot-Limit Omaha, and sometimes China Poker...
And possibly there will and new ones in Future!
Well, by the frequency with which I play each one of the games I'm going to list Hold'em / Hold'em / Hold'em would be more "faithful" to reality, but responding to the topic, 1 - NL Hold'em / 2 - Omaha PL / 3 - Badugi