how much aggression to show with TPTK

[catlover]

Preflop -- I had been folding blinds left and right and felt a need to take a stand, even though my hand was not as good as I would have liked.

Flop -- He made a continuation bet. I don't put him on much of anything yet. I think my top pair is likely to be good. This is my standard raise size -- about half the pot. People fold for that plenty of times, though this time he didn't.