Hand 1 - consider raising AJ, post flop, fine.
Hand 5 - you chose to gamble with J2, don't raise, you don't loose here. Post flop, fine.
Hand 6 - I don't care for this. The pot is 10BB and you're pushing for 40?

Your first 4 are fine, sometimes you beat the shorties, sometimes you loose. If they're tight and push you may want to be careful. If they're even semi-loose then TPGK is the nuts post-flop, get them all-in.