$1/$2 NL, live, full table. My image is probably TAG to my opponents; it seems I am winning any pot that I either raised preflop, or initiated betting on the flop in an unraised pot. The table is mostly passive, several timid opponents, occasional deception, no LAGs from what I could tell.

Hero stack = ~$450
Villain 1 = ~$130. He was very quick to act with his decisions. Postflop, his quick calls of other opponents' bets were usually with at least TP or a draw. He did not raise postflop unless he had 2-pair or better. 30-ish year old guy, headphones and sunglasses, listening to metal music, I could hear it from across the table. I have outplayed him or had a better hand than him literally every hand we played vs each other, and he seemed visibly disturbed by it.
Villain 2 = ~$300. Only sat at our table ~30 minutes prior, but won a big pot pretty quickly, in which his Q3o (which he had limped UTG) and 2-pair beat out an opponent's inferior 2-pair. Also deceptive once with trips. 65-ish year old guy. His range is wide, albeit a passive player IMO.

Multiple limps around the table, including V1 (HJ seat) and V2 (button). I raise to $15 from BB with AK. All fold except V1 and V2, who call.

Flop: K9J. Plan: straightforward I guess....betting for value.
Hero bets $30. V1 says "how much is that?" and calls very quickly. V1 leans forward with interest. V2 also quickly calls.

Turn: T. I am convinced that at least one of my opponents has 2-pair or better now. Coordinated board + draw to nut flush = I'd rather control the pot than create a difficult decision after a bet.
Hero checks. V1 checks. V2 thinks for 10 seconds, then checks.

River: 5

Hero? How much are you value betting here, assuming you are value betting?

OOP I raise a little more to 20$ preflop but this is not a big deal.

Flop is fine, simple b/f against typical passives.

Check on the turn also good. Chances of being ahead v two players are small.

Just because turn checked through I don't think you can value bet the river. Waaaaay to thin.

Agree with quesuerte on all points. Raise a bit larger PF OOP, b/f flop, and just check river, since value-betting is too thin (not sure what worse calls you, maybe AJ / K8s but that seems like it and not even sure if those are in villain's ranges).

Thank you for the feedback. I'm thinking along the same lines as you guys. The river I contemplated a "feeler" bet, say $30-ish again, but I was more strongly contemplating how coordinated the board was. Maybe it's hindsight thinking here, but I only posted this hand b/c I feel I should have bet the river. If I knew one of my Villains had aggro tendencies, then I obviously check. But my reads on them were tight/loose mix, mostly straightforward/rarely deceptive - so perhaps a bet would have been safe. The disadvantages of not having position - Sigh.

Raise more pre.

As played flop bet has to be bigger. Bet pot or close to it.
Turn is good.
River check, with intention of folding without soul read.

I agree too thin to bet for value but should we maybe be betting (as a bluff)70$ since we can rep AQ/AJ

It only has to work like a third of the time. I bet you get Q's, small if they even have that, 2 pair to fold a lot.