Triple draw can get a little expensive at the ring tables. You may have had a bit of beginner's luck but hope you do continue to do well.
I prefer the 2-7 NL single draw. However, there are no micro tables, so you do need a bit of a bankroll to play it. I'd suggest, strongly, that you get your feet wet at the play money tables. And then try one of the play money tourneys. Like any game, play money brings out the donks, but if you can prevail at play money, and get a real handle on the game, you are taking less of a risk at the RM tables and tourneys.
As in any game, tight aggressive play is best.