Hand #1: you did get heads up, good (especially with AJ - not a power hand in a multi-way pot). He made bad calls with a so-so draw and sucked out on you. Well-played by you.

Hand #2: I wouldn't bother raising this hand if they're all calling most of the raises anyway. It's a mediocre hand at best and won't play well in a big field. Then 4 see the flop and you bet out with just overcards... a bit risky. It went alright for you but overall I'd say this is a hand where you'll be lucky to break even in the long run. I like to save continuation bets for hands with two or three players (including me) in them. In this kind of hand someone will call you, and probably be ahead of you.

Hand #3: Modest raise with JA (again) from early position - don't bother unless you just want to juice the pot. It's suited so I'd probably limp in. You won't isolate on anybody in this kind of game. Basically if you limp in you want the flush or two pair; play it like a drawing hand. You got a decent top pair here on a non-threatening board; unsurprisingly you were called all-in by a draw. Unlike hand #1 he didn't hit, and you won. Good hand. I'm not crazy about the pre-flop raise but I like the results.

Hand #4: better raise, but everyone's calling anyway. This is a good point at which to take the hint and stop raising marginal hands like AJ and AT. Limp or fold. You don't want to be in a 5 way pot with AT trying to bet people out, or with a mediocre top pair like tens.

Hand #5: I like the raise here better, it's still a strong raise but you have a made hand, plus if the set hits you can take down a very juicy pot. You're not trying to make people fold here but basically just juicing the pot. Your post-flop play is not great. I would fold to his first raise (calling stations only raise with a good hand - you think he DOESN'T have that king?). Although he is short-stacked - it's hard to fold knowing he can only put in an extra $4. Personally I think you should let this one go.

Hand #6: Kind of a tough beat. It's hard to put him on a 2 when he raised and then called a re-raise. However it's worth considering that a pair of tens is not worth getting broke over. He could have an overpair, easily... ask yourself, what hand would he play that way? Any overpair (you lose); AT (split pot); any 2 (you lose); tens full of twos (you REALLY lose); maybe AK if he's aggressive and stupid. Your best-case scenario is that he's a moron with AK, and second best is a pot split. After that he's probably got you crushed. Again, even though it looks like a good flop for your hand, you have to be sensitive to his aggression.