I have since forgotten details of villain so just assume normal stuffs.
This also may be super standard but the long hiatus from poker makes me question certain li lines.

Hero opens AKo UTG, LA calls, bb calls.

Flop KT6r

Bb chk, hero bets, lp folds, bb raise, hero calls planning to raise all turns.

Turn 3
bb bets, hero raises, bb 3bets, hero folds.

I'd calldown.

I would call the turn three bet. You have hidden outs even if he has two pair with a K.

I would raise an Ace river, call a K, and fold the rest.

You're beat, but I'm calling down UI.

This post is dumb. Give your head a shake. If you are beat, you should not call down UI.

At 8/16, I expect very very few players to 3b bluff on turn. You could have as many as nine 2pair/counterfeit outs, or as little as 0 against against a set. Villain could also have AA or AK. Define a villain range, count your odds OTT. Being in position mitigates your RIO and might even give you a wee bit of IO. Soulread on board pairing cards. Definitely do not call down UI.

I would call the turn three-bet and any river bet (raising if we spike an ace). If we don't improve I don't expect to win very often, but often enough to justify the calldown.

I disagree your good often enough in an 8/16 game to call down. The hero raised UTG, called a CR on the flop, then went ahead and continued to show more aggression on the turn. Players at this level aren't value 3 betting worse here and are very rarely if ever 3 bet bluffing. The hero here felt compelled to fold to the 3 bet which indicates to me he doesn't think this guy is getting that far out of line.

Me too.

OTOH if he called flop and raised turn, I'd consider folding. One of the most important things I look for is how players play strong hands on less peel-friendly flops such as this.

I'm never folding there.

It was me. I had either QJ or KT, but I ain't telling which.

Just 3 bet the flop?

If 3 bet the flop and BB capped and fired the turn then I would just call.

The villain's C/R on the flop is a pretty strong play -- so I am not a fan of raising on the turn.

I think I would 3-bet on the flop for information. If the villain 4-bets here, we know we are beat and can decide to fold now or call down hoping to improve.

I would have 3 bet the flop. As the flop was played, I call down after bb bets the turn. I would not raise the turn. I doubt you are facing a double barrel bluff here. But you showed some weakness on the flop with your call; so villain could be betting out with any K and any paired kicker (i.e., a 10 or 6). Villain can also be betting a lesser pocket pair or even a 10x hand. Of course, all of these hands justify your raise on the turn. On the other hand, because Villain is in the bb Villain calls your open with a wide range. Thus, the flop also could mean Villain has a set, 2-pair, or AK. Less likely, but possible is AA. So just as there are many hands villain may hold with you way ahead, there are many hands you are also way behind but with outs remaining (probably at least 2 and as many as 5). With your position, you also have IO working for you on the river if you improve. Hence, I am not folding, but I am not excited about betting. Call down UI.

Calling down from the flop raise is way too weak. We can easily put in another aggressive action, by 3-betting the flop or by 2-betting the turn.

I think there's a legitimate debate which one is better. Raising the turn is better on the assumption that villain calls down from our aggression. But that's not a slam dunk here.

We also need to consider the turn. What does our hand look like when various turns hit? Both in terms of the board and our image. We put villain in a tough spot with a weak made hand like T9o when he thinks we could semibluff AQs with a turn flush draw. On a KT6r board, we lose a lot of weak hands - on AKQJT, maybe 9876. If he's going to bet/fold a large part of his range, we need to bluff a lot more than we're capable of on this board.

I put you on KT.

B/3b this turn with QJ would be awful spewy given the action and the fact that almost no one ever r/ folds here.

This being said, you may have had a read that you could get away with it here.

Put a flush draw out there and I'm more likely to call down. There are also certain opponents I'm not ever folding the river to. I still think at 8/16 against most players this is a fold on the river.