What Color Should I Paint My Nails?

I want to paint my nails but I don't know what color I should paint them. I'm painting them as a reward to myself for getting through a really tough midterm that I have been stressing over for weeks. And I'm also painting them because now that I'm crushing on a guy that I see one day every week (and I actually had the courage to go up and talk to him last night and things went really, really well) I feel like I should maintain a nice image (even during the six days when I don't see him) at all times. I'm a very indecisive person, so I'm having a lot of trouble making such a simple decision. Please help!