15 +1 AK is this weak tight

[Roland32]

Alright, it seems there is a theme to all the hands I post. That I am to loose aggressive first couple of levels.So I have been trying to tighten up. I hated the way I played this hand because of the turn and river bets. I will usually try to check raise turn, or move in on river?
Thoughts?
PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (6 handed) converter

CO (t1025)
Button (t380)
SB (t1985)
Hero (t3620)
UTG (t3975)
MP (t2515)

Preflop: Hero is BB with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">UTG raises to t300</font>, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to t1050</font>, UTG calls t750.

Flop: (t2175) K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t600</font>, UTG calls t600.

Turn: (t3375) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t600</font>, UTG calls t600.

River: (t4575) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t600</font>, UTG folds.

Final Pot: t5175