[TheWorstPlayer]

There is not much practical earnings limit playing either limit or no limit. It is basically a style issue, I think. If you prefer to play 8 tables of 15/30 you can probably make the same amount of money that way as by playing 3 tables of 25/50 NL or whatever (I am too lazy to make reasonable assumptions and do the math, but it should be clear that this is an easy exercise to do). So it just comes down to which game better fits your skill set and your playing style. And nothing says that you can't play both. But for me, and I'm guessing for you, the largest determinant of my earnings for the near future is the level of stakes that I play. So I am just working on improving my game and building my bankroll and then moving up stakes. Certainly NL is not the limiting factor on my win rate.