position vs TAG NL 600 -- how much pressure???

[einbert]

this was supposed to be BBV but since i put it in a strategy forum i will put in a hand of poker for you to analyze

3/6 party poker
TAG opens UTG, i call on button with T9s, blinds fold (effective stacks 100bb)
flop is Q82 with two spades. UTG bets pot, i call
turn is Q. UTG bets 2/3 pot, i raise pot
turn is 8. UTG checks, I go all in for about $400 (pot is about $400)

comments on all streets appreciated. My image is slightly loose, slightly aggressive tag