theory of position based c-bet sizing

[koboosh]

I've heard it explained that your standard c-bet sizing should change according to the strength of your range. So that means on the BTN you should be c-betting smaller with your whole range.

E.g.
You open UTG. Flop: A38. You hold AK. You c-bet 2/3 pot.
You open BTN. Flop: A38. You hold AK. You c-bet 1/2 pot or even less.

Aren't we missing value by forcing our bet sizing to be so small?
I'm guessing this would vary according to the opponent.

Vs a really agro player who always wants to take initiative we would look to c-bet smaller.
Vs a nit we might also look to c-bet smaller on BTN since we will make more money on all the small pots then we will 3 barreling him with a set.

What about wet flops? It seems bad to half pot it or c-bet smaller on it from the BTN. In this case I'm guessing it is better to cede more pots and strengthen our c-betting range from the 70% opening range we might have on the BTN.

Despite all this I've noticed alot of good HU regs seem to just bet like 2/3 - 3/4 standard c-bet size on most flops vs anyone despite their range being ridiculously wide. This seems to contradict the fact that it's more profitable to steal lots of small pots cheaply with a weak range then just bet big.

[koboosh]

The other thing I'm not sure about is whether we should be half potting dry flops or close to potting them when we are in early position.

E.g. flop is Kxx rainbow. As UTG do you bet 2/3 to get more value from pps and worse Kx or do you bet like 1/2 to make your bluffs cheaper?

problem with the 1/2 pot is your just never getting much money in by the river unless you cooler villain...

[guitarizt]

I feel comfortable with sticking around 2/3 pot cb sizes given normal circumstances. I went through a good chunk of hands at 10nl trying out half pot c-bets but I found that my c-bet succcess would drop to about only 33%. With 2/3 sized c-bets it would be about 40%. They're both proportionally the same in how often they have to work, but I felt like I had a better idea of their ranges and it was easier to get value if I stuck with 2/3 pot sized c-bets. I also get paranoid I induce stuff with half pot bets and there's a decent amount of board textures you can't get away with half pot sized bets.

I could always bet half pot on dryer boards and 2/3 pot on almost anything else but I don't think people play back enough on dry boards and I think cb'ing 2/3 pot is still fine for now because people call too loose preflop so you get enough folds and I feel like I get more folds from ace high than if I bet half pot.

Since this is about theory though, the examples you gave make sense to me although in practice I think cb'ing half pot in the first utg example makes more sense. If the board was wetter, say KTxtt you could probably bet 4/5 pot utg and 2/3 to 3/4 pot from the button. That being said you would have to figure out what your checking and barreling range should be from the button since I think that's much more important than messing around too much with bet sizing. I think regs at least at 100nl and lower c-bet way too often.