Need some HU advice

[poboy]

I am pretty happy with my results so far, with one exception. My win rate is not as high as I think it should be. I money in over 50% of the SNG's I play however the large majority of them are 2cd's and 3rd's. I currently have a 49% ROI, but feel if I could just turn a few of those 2cd's into 1st's it would be much higher. My finishes look like this:

1- 12%
2- 22%
3- 19%

My general HU strategy is to be super-aggresive. I raise w/ any A or K,suited connectors, and sometimes with garbage. If the SB limps I auto-raise no matter what I have and fire a pot sized bet if he checks to me. This works well against an overly tight player, but against normal opposition my results haven't been so great. Any advice would be much appreciated. Am I correct to go into hyper-aggresive mode?