T-Stone 100+20: Couple hands

[quickfetus]

A few hands from the Sunday 100+20 no rebuy at T-Stone. My plays and their results omitted in certain hands; interested in all sorts of feedback on any of them.

1) 1st level 25/50, 4500 chips. No reads.
2nd hand of tourn. CO makes it 250 after a limper, I call 200 more in BB with JThh. Limper folds. Flop 68K with 2 hearts. I c/r a bet of 200 to 900.

2) Blinds still 25/50. With around 5000 and prolly TAG image, I open for 200 with 98o from the CO. Button (tight) and sb (likes to play) both call. Button is avg. stack, button around 6000. Flop AK6. Checked around. Turn 7 completing rainbow. SB leads for 250, I call with OESD, button mucks. River brick, he bets like 300 and I fold. Him and some other players had been making similarly smallish bets, so I didn't make too much of them.

3) Next blind level, 50/100 with 25 ante. I have about 4500. I open UTG to 400 with 33. Too loose? Tight guy (button from hand 2) smoothcalls, everyone else folds. Flop 774. I lead 600 into 800, he shoves.

4) Next blind level, 200/400 with 50 ante. (approx). I have about 3600. CO (around 30, dark glasses and huge headphones, prolly one of you guys) shoves for slightly less. I have AQo in the sb.

Thoughts?