As an OP, it only makes sens that I start with a post that fits into the description of the thread,
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One loose player at my table called a pot sized river bet with medium pair against a pf opener and after the aggressor mucked, the loose player explained very loudly his thought process: ' Once you bet half pot on the flop against two players I knew that you had nothing.'
After hearing this I figured that against this kind of player a half pot bet otf as pf aggressor might induce loose calls on several streets. The other thing that I figured from his sentence was that If I was to bluff at him on the flop i had to use bigger bet size. There is a small caveat that he wouldn't apply this thinking against every player, but at least we got some help for our bet sizing against this player in the future.
Soon enough, I opened JJ from MP for 20$ (250$ stack), the loose player called from the BTN, SB called and BB called.
Flop(80$) came A J 4 rainbow, SB and BB checked and I went for a 40$ (half pot bet!).
As expected the BTN quickly called and the SB called after some consideration and BB mucked.
Turn (160$
) was a 10, that brought a flush draw as well, SB checked and I bet 90$ after giving it some thought, BTN called and SB folded. I bet the remaining 100$ before the river card was dealt and got an insta call from the BTN. He just mucked after I tabled my hand.
To be honest 1/2 pot bet OTF might be optimal even without this extra information, but maybe sometimes I would bet slightly more than that. Listening to what this player was talking about helped me to find the exact bet size to lure him in all the way.
Lesson 1 to be taken here: ' Don't explain your thought process when you make good plays. '
Lesson 2 : 'Pay attention to what people say'
P.S. I know that this is not the most enlightening hand, but since it is the most recent one that fits into this thread, I've decided to share it here.