Nail Polish: Favorite/best Brands?

I have close to 100 OPIs and than less than 10 each in Orly, China Glaze, Zoya, Essie and sally hansen brand. I have 1 Chanel and 1 Dior. I LOVE Diors staying power but not the price..
 
I'm a huge fan of OPI polishes. I can wear it for about a week before it starts looking unpresentable. This is a huge feat in my opinion, because I work in an office and am typing on a computer a LOT. I can't begin to guess how many bottles of OPI that I own. My favorite polishes from OPI are the Designer Series, due to all the sparkle they have.