fpp/500+ plrs: pp and linear bets

[jus_nutz]

i just dont like my play here, were these linear bets like sh... are linear bats no good in all? i am not happy as they seem to express some weakness ... what is your play on all streets?

PokerStars Tournament, Big Blind is t150 (8 handed) Converter on pregopoker.com

UTG (t6583)
UTG+1 (t5415)
MP1 (t890)
MP2 (t9872)
CO (t3630)
Button (t2180)
SB (t4935)
Hero (t6680)

Preflop: Hero is in BB with 6[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]
UTG calls t150, <font color="gray">UTG+1 folds</font>, <font color="gray">MP1 folds</font>, <font color="gray">MP2 folds</font>, <font color="gray">CO folds</font>, <font color="gray">Button folds</font>, SB calls t75, Hero checks

Flop: (t450) 4[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/club.gif[/img] (3 players)
SB checks, <font color="red">Hero bets t300</font>, UTG calls t300, <font color="gray">SB folds</font>

Turn: (t1050) J[img]/images/graemlins/diamond.gif[/img] (2 players)
<font color="red">Hero bets t450</font>, UTG calls t450

River: (t1950) K[img]/images/graemlins/spade.gif[/img] (2 players)
<font color="red">Hero bets t450</font>, UTG calls t450