I use to play mainly tournaments, but now I do not have the time to play really long tournaments and I don't like the push/fold nature of turbo tournaments.
So I mainly play cash now. I like that I have the option to leave early if the table is really tough or I am not feeling good enough to play. A lot of live tournaments have really crappy payout structure (rake traps) too so I avoid those like the plague.
I still play $1/2 live (not rolled for higher and casino I play at doesn't even have 2/5). It plays like 5/10 at times though. Few players constantly straddling for $10-100 (Yes I've seen couple $100 straddles) I would raise preflop for a $100 because the blinds & straddles get so big.
Highest I've played online was $10/20 NL 6 max (2k buyin). That was for one full orbit though
Played a decent amount of mid stakes though $1/2 $2/4 $3/6.
Online cash games in the low/mid stakes plays a lot more wilder/LAG. I see a lot more light 3 bets and 4 bets. Ranges aren't as tight as in $.01/.02. Post flop play is pretty solid though. Biggest thing though with online cash stakes outside of microstakes are there are a lot of really good regulars up there playing for years.