Whipped is my new favorite black base. Two coats and it was opaque, the dry time was fast as well. I love the way this looks because it doesn't look flat matte, it's kind of dewy looking.
I'm going to be on the hunt to find more of these, they're really great. I want to try them all, especially the Sinful Safari Brown. Plus for $1.99, you can't beat it. They're awesome to stamp over (more on that later).
SinfulColors Leather Luxe, $1.99 exclusively at Walgreens for Fall 2013.