My observations:
Commerce and LA/SoCal area in general: loose, aggro, crazy, but fun!
B and Vegas in general (except when a drunk tourists strangely wanders in): tight, passive, boring. They get huffing and puffing if you beat them with a "bad" hand.
Blackhawk: loose, passive, (too) friendly, makes it correct to just open limp in EP sometimes, e.g.
B101 and other Bay Area: actually weird, like half the game are pretty good players, but the other half are tech money people that sort of take similar to the LA games, but lack the crazy vibe.
Washington State (back when there actually mid limit games): tight, but passive and boooy, did they take a long time, like they would stare you down on a river decision... in limit...
Have not played CAZ/East Coast.