Limit holdem is much more math based. Because of the fixed betting size, your edge is smaller since you a) can't get as good of implied odds as in NL and b) can't force players to make pot odds
mistakes nearly as often.
There are some spots where you can raise or check-raise to confront the field with a double bet which would make them choose between folding and calling with poorer odds. But for the most part if someone has an 8+ out draw or even a 5 out draw (say middle pair against a likely top pair) they are getting odds to call down. Because of this often playing tight preflop in order to make better hands postflop (eg AT-AK crushing their any ace range when an ace flops) is correct.
On the plus side, the megadonatorfish don't lose their money nearly as fast as they do in NL (speaking mostly of cash games here). So they keep coming back for more I've seen such awful players playing LHE that it's a marvel that they aren't drooling on themselves as they play.
At the right table it's also an action fest, but in a good way. Chances are that in a NL cash game, if it's generally aggressive, it's full of solid aggressive players, rather than the maniac/megafish that inhabit limit games. You know the type, the "courtesy cap" with any hand they want to play, just to play a big pot.