In my experience (which may not generalize to your player pool):

Preflop:
- Recs play way too loose. TAG regs play too tight, especially from late position and the blinds.
- 3-bet ranges depend on the player. Some TAG regs have good 3-bet ranges. Others have garbage ranges (way too tight or way too loose). 3-bet sizing is often awful.
- People play badly against 3-bets (either calling too much or folding too much, or even worse: calling preflop and folding flop too much).
- 4-bet preflop ranges are very tight. However, with people who play like 30-50 BB stacks, their 4-bet shoving range can be fairly wide, so you should be willing to get it in with reasonable ranges.
- 2-bet flatting ranges can be surprisingly awful. I've seen TAG regs call from MP with A7o against a UTG open.

Postflop:
- Triple barrels and big river bets are very value-heavy.
- Check-raises on the flop can have a lot of bluffs. Turn check-raises are very value-heavy. River raises are almost always nutted.
- People overfold to big bets/overbets on turn. If people call a big turn bet, they often call river as well, though not always. Smaller turn bets don't get much fold equity because if people call flop, they usually have something.

All these tendencies have obvious adjustments. For instance, since people play badly against 3-bets and 4-bet too tight, you should open up your 3-bet ranges. You might want to play exclusively 3-bet or fold against TAG regs (except from the BB).

You have to play your opponents, players strategy will vary there a lot. From solid winner players to crazy maniacs.
From non-believer regs to ''fold everything'' type of guys.

In short sentence general suggestion for preflop: play tighter openraise strategy, learn to play BB well, less 4bet as a bluff, and isolate more weak players.
for postflop: smart agression, check/raise and follow through and giving up/underbluff on certain runouts