hand 1:
First of all, it matters a lot that it's a 5 handed game and what our image is. I'm not raising QTo in this position i.e.

I'd cbet against a fish because he folds a lot of non-pair hands. I'd barrel T+ on the turn, give up after that.

The reg has a hand here, or c/r's missed overs, too much to cbet air against him imo. I'd check behind and bet J+ on the turn/river if we're not lead into.

I'd bet 8x+ as a value bet against both, and check behind other made hands.

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hand 2:
I check behind against fish and regs. Betting any turn when checked to.
Against an unknown calling a turn bet on a non 6/T/J and folding to river aggression if I'm not improving.
Calling really only becomes an option with reads on villain imo.

(i.e. if we know as much as he's a donk or overaggressive I've no problem calling blank rivers)