Hand one, usually here I would raise to 15, and fold to further aggression.

Hand two, on a table of rocks, I think you played fine. i don't like raising lower pairs on loose tables

Hand three, this situation definitely sucks, would depend on what I thought of the guy. I might call and hope he bets small and call or check behind on the river, or i might just fold here, depends on what I feel the guy is capable of/how big an idiot he is. i'm probably folding more often than not, because he's probably going to bet 20+ on the river, and IMO paying 30+ more on this hand isn't worth it.

Hand four, not really sure why this is posted its played fine.

hand five, i would bet the turn and check behind on the river, too often when you check behind on the turn they will get their balls up on the river and put in a big bet that's really hard to call. If you bet and they raise, ditch it. if you bet and they call, there is a good chance they'll check the river to you even with a better hand.

hand six, goot.