[Isura]

Learn them all. I played limit holdem ring games for a long time. Then I got into MTTs and SNGs for a bit. Went back to ring, and played a ton of short-handed (5-6 max) limit holdem. That really improved my overall poker game, and short-handed limit holdem is a blast. Back at SNGs now, but mainly only for the profit, and I play about a dozen MTTs a week too.

Becoming a better player is important, but enjoyement and profit are just as important IMO. SNGs are a nice low variance source of profit (compared to LHE atleast), and I it's a very relaxing and enjoyable form of poker for me. Poker is first and foremost a game of money, there's no inherent value in becoming a better player.