Well I would probably go with brunette aggressive chick - I love a good challenge and I hate the color blonde quite frankly. Most people over-do-it and make their hair so white its blinding - furthermore brunette is much more appealing as I also have brown-ish ; ) hair...
The aggressive part I find very attractive, I don't like a fragile darling I want a chick that wants to wrestle and get dirty with things but at the same time she can be a woman - afterall I would be terrified if she had a package for delivery =/
Blonde Petite and innocent all the way, but that's just me I like petite women because I like how perfect petite women look. Unless your talking straight skinny petite I mean just small all together like 5'0" and 90-130 pounds= PERFECT to me. Hair and skin color is of no concern as long as their is a beautiful mind in there.
I'd go for the voluptuous and aggressive brunette. I usually like brunettes better than blondes, petite is good but voluptuous and curvy is hott, and I kind of like the aggressive women - like the feisty Latinas and Italian women.