Hand 1: $5 is a weak bet with that pot size. I'd raise here, and then decide where I'm at if he calls/raises. Him having the Str8 is unlikely in a raised pot (Q9??). He may be bluffing with a Str8 or flush draw. It does seem odd, though, that he came to life on the turn when that ten hit the board. He may be slowplaying a set (and stopped slowplaying when the Str8 draw became a bigger threat), or he may have JT for 2 pair (but why call a pre-flop raise with JT?!). I'm guessing it's ATs, he was on a flush draw that missed, but now he's going to try betting his 2nd pair top kicker (and he has outs if you call). You say that the BB isn't a crappy player on this table, but that weak turn bet against a scary board with both a Str8 and flush draw has me wondering. I've put him on ATs or KJo/s, possibly JT (ouch if it's this). Raise, and take it from there.

Hand 2: Somewhat possible he has Kxs for the nut flush draw and is semi-bluffing here, but that's a bad play without overcards to the board. I'm guessing he hit two pair with Ax. He's overbetting the pot to look like he's trying to buy it, and with your money in the pot already and a flush draw on board he could care less if everyone folds, but he'd like a caller. I can't fold this one quick enough. Fold!

Hand 3: You say this guy is pretty fishy, so something like J9 isn't out of the question. You should be beaten, no question. This guy apparently could be playing T9s or J9o....you're still beaten most likely. He could be bluffing at a missed flush draw, but that $2 just screams value bet, not steal attempt. It may still be worth another $2 to call, maybe not. I'd put him on a QT or QJ that got scared a bit by the King on the turn. Bah, I'd call...only because of how fishy you're making him out to be. I'd hope that he's bluffing a missed draw after your turn check. I sure as hell wouldn't raise. Call, but be prepared to lose that $2.

Hand 4: I'm not sure I'd fold this. You say UTG is loose, but solid. Solid to me means not chasing a Str8 draw, so I've put him on something with the Queen. Let's just hope it's not some crap Qx 2 pair hand, and that it's QJ/QT instead. How loose is loose? Would he play any suited Queen? Is 2 pair that likely? Unlike what many others have said, I feel the Str8 is unlikely if he's loose but solid, unless it's Q6s. Call.