[Q10 soooted]

Hand 1 - Your PF raise was probably fine but if you didn't want 2 callers you could have raised more.
There's $13 in the pot and you bet out $6 after the flop. This is enough to push a tight player of an OESD or flush draw if they have nothing else, but
The OESD + flush guy had 17 outs or 2.76:1 to call (if he wants to count all of his outs to the baby flush). When your post-flop bet was called and there was $25 in the pot he had an EASY call. Note that in order to NOT give him odds here you'd pretty much have to go all in for your last $15.50 and have the second person fold.
The moral of this is that you're always going to pay off to this guy playing 6h, 5h on this particular flop unless you push after the flop and don't get outdrawn, but you're $6 post flop bet wasn't bad.
Betting $9.50 into a $31 pot at the turn doesn't make sense to me. Now you have straights galore showing on the board and 2 flush draws. No one is going to fold to your bet. I think you should check the turn & you might be able to get away from the hand if someone comes back at you.

Hand 2 - good 4xBB PF and pot-sized flop bets. The guys an idiot who hit a lucky flop. *shrug*

Hand 3 - I see 3.25 in the pot when you called the 1.60 bet. Unless you thought you were ahead you had 9 flush outs or 9/47 odds 5.2:1. Easy fold on the all in behind your minimum raise. If he beat you with QQ when your flush didn't come this wouldn't have hurt so much but you were still behind and didn't have odds.