Can you be too much of a TAG?

[Bigwig]

I'm fairly tight, but when I play hands, I'm often raising. Also, I'm often betting most flops regardless if I hit or not when I'm the one who raised it preflop. So I'm the guy who's high pressure. However, I think that as an SNG progresses, players will begin to bluff back at me. And often, I'll have to fold. How do you determine when to draw a line at your aggressive post flop play? I mean, they know I'm going to bet, so I think I set myself up for a trap at times.

Suggestions?