I agree with Young Faithful. Your personal statement is important, but seeing as how most schools give you a secondary just to get your $75, I would not stress about your AACOMAS essay and would focus more energy into my secondaries.
Since you are already ahead of the game, you may want to check out a few school websites and see what their secondaries look like. Then you can start working on those essays.
But thats just my 2 cents. My AACOMAS was decent, but not as good as my secondary personal essays. And just for arguments sake, I will tell you that in all of my interviews (3 DO and 2MD) I was complimented on my secondary essay. So don't sweat it...if I could get into med school, you can too...
Good luck, and if you need anymore proofreaders, PM me.