$2nl-5nl play the same imo. $10nl isn't much different. Moving up from $10nl to $25nl is weird, given the odd blind structure and this is where you'll start to run in to some decent, yet exploitable regs. $50nl is a snooze fest. $100nl is fun poker, where surprisingly you'll find more fish than some may think. $200nl is by far the biggest jump, however I haven't spent very much time there and I'm basing this off what others FTR regs have said.

Anyway, I hold $5nl in the same respects as $2nl. They're both filled with such terrible players that it's hard to learn how to play actual poker and not continuously play so straightforward. The only way I would ever recommend anyone ever playing these limits is if they've never played the game and want to learn the fundamentals on the cheap.

I'm not sure where you stand in that respect, but you stuck it out at $2nl for 60k hands, so at least you've obtained some patience along with a few extra bucks in your roll. Looking forward to reading your progress. Good luck.