Villain just sat down at the table and this is his first hand. I played with him once before for a couple hours. He fast plays draws, is capable of bluff raising, and generally strikes me as a good player. He looks to be in his 40s. $400

Hero is probably viewed as TAG. Not sure how attentive he is. $1500+

1 limp in EP, hero raises to $10 with 9d9s, folds to villain on the BB who calls, EP limper calls.

Flop ($30)

6h6d5h

check, check, Hero bets $18, villain raises to $55, fold, hero tank calls.

Turn ($140)

7c

Villain bets $140, Hero ?

i fold flop since at micro stakes i'd just weigh peoples ranges much more heavily towards made hands.

Ouch. Villain has put in half his stack, so we have to assume he's prepared to stack off.

The check-raise on the flop is interesting, since you said that villain 'fast plays draws'. He probably checked, knowing that the preflop raiser would probably bet, although I'm not sure I'd bet such a wet board, even with no high cards. The raise on the flop might be as a bluff, but putting in a pot-sized bet on the turn? Unless you have a read that villain is capable of big double-barrel bluffs with air, you have to assume he either already has a massive hand or is at least on a massive draw.

Villain was in the BB and thus was able to call your preflop raise knowing he was closing the action, so he probably has a fairly wide range. As such, I think there are too many potential hands that cause us all sorts of trouble for me to be that comfortable putting in more money with just an over-pair. The 8 probably isn't a clean out if villain is on a flush draw, so we probably need a 9 or a 6 to boat up, so only 4 outs, and that is only if villain doesn't have a hand like 98s.

Don't like the pot odds, don't like the steady aggression. I fold here and find a better spot.

Almost positive villain has a 6 here. What else is he playing this strong? He's making it too expensive to find out and you say he's a good player so he's probably not messing around with air.

Pretty sure only alternative is to shove. We hate a lot of the cards that can come on the river.

I like the call and re-evaluate on the turn.

I c/r a lot in when in V's position. This is actually a rare situation that complete air is a decent part of my range, so are a lot of semi-bluffing draws.

If V is actually a solid, thinking player, IMO this is a call (but it's close). Although, bet-sizing may be a bit of a tell here, in the sense that PSBs lean more towards made hands than bluffs.

If any reason to think V can't bluff / semi-bluff here than it's a clear fold.

This is a pretty villain/read dependent situation IME.

With what I have to go on ITT, I'd fold. There's no point in stacking off with 99. When he pots the turn that's serious business.