I think brand matters a lot, personally, but I don't always have the best luck with high-end stuff. A friend convinced me to drop some change on Zoya polish, bvut that stuff chipped in a day or two for me. I have had the best luck with Sally Hansen (even better than OPI), and I do two layers and a top coat of clear. I have heard Dior is great, but haven't tried it yet.
First 10% goal (180): MET 2/1/14!!!
Next 10% goal (162):
Next & final 10% goal (145):
St. Pat's Challenge: