Much like shoes and handbags... I haven't really met a nail polish that I don't like. Pink, Red, Blue, Green, Burgundy, Yellow... I'd buy them all, but I do somehow restrain myself, though last week I went overboard on Sephora by OPI. ;)

I paint my nails at least once a week, sometimes twice, (finger nails... I am terrible at toes and leave that to the professionals).

I think my first nail polish purchase was a Hot Pink by Wet n'Wild when I was around 7 or 8...I have graduated over the years to Revlon, O.P.I., and essie. And now OPI and essie make mini-bottles so you can buy even more :D