Hand 1 I think you played this fine. Sometimes I just call turn to see a cheap showdown.

Hand 2 I just complete this in 6max. Playing OOP sucks. As played, definitely 2-barrel on the turn. Just check/call a small bet on the river because his two most likely holdings got there on one of the last two streets.

Hand 3 Bet the flop. Bet again the turn. I suppose you have to check/call on the river in case of a flush draw.