I really don't have a favor brand that I prefer to use I use all different kinds of brand like NYC, Wet N Wild, OPI, Sally Hansen and Relvon. I have over 50 bottle of nail polish in all differenet colors.
I have tons of nail polish too. I usually change it when the current color starts to chip. Right now Ive been wearing a lot of red and pink nail colors.. Right now its pink but its badly chipped it needs to be repainted.