I like the first pic better, you look laid back, cool and just a spunky chick to talk too. Thats just my personal preference though, Girly girls often look beautiful but there is something about a girl in a t shirt and jeans that just does it for me. One of the most fun and nicest girls I had the pleasure of dating looked like a female version of kurt cobain... am I weird? Yeah..probably...
Btw, some women know they are beautiful, but most often they don't> I knew a girl who was absolutely gorgeous but seriously believed she was ugly. I couldn't get my head around it at the time (I was 15 I think) Its only later that I realized that how you hold yourself in your minds eye, and how others percieve you is often vastly contrasted.