[masse75]

Hand 1: bet out the flop. There's no way he puts you on a set of 3's, and he probably raises with TPTK. On the button, he can be on a variety of hands: a middle pair, or ragged AQ.C/R the turn, and bet/raise away on the river. Best I'd put him on is top two.

Hand 2: no major disagreement. I might've bet out first on the river. Top pair with decent kicker with threat of trips. More likely check/call and fold to any raise.

Hand 3: Fold the flop. SB probably on a 1-card draw like you, but you're only ahead of 2 other flushes.

Hand 4: 1 bet for the possibility of winning 13. Think you're 8% to win? Probably lost to a donked straight or made 2-pair. I call and kick myself later, but worth a crying call.