[Seb86]

I usually play 3/6 so I am not sure about the general agression level at 15/30.

I cant see any value in betting hand #1, if you opp is not a maniac folding once in a while in that spot isnt horrible, he is not value betting worse so you only beat a bluff.

hand #2 I would check raise either the flop or the turn. Not sure why you check / call the turn and think all of a sudden that your hand is worth a value bet on the river.