I really like the second of these three. The portrait is flattering, the lighting is lovely, and the DOF is nice and shallow to minimize distraction of that background. To me it looks like an image that would be used in an ad for a college or bank, so hopefully that commercial look is something that you're going for.
I like the first one as a sort of "street photography". The processing is a little more gritty than the second and doesn't have the commercial look. It has a nice composition and good focus on the eyes.
The third IMO does simply look like a snapshot. The lighting is a little harsh and the people and colors and the background are distracting.
Hope this helps!