I'm always in search for a great neutral shade. Brownstone (NYC) is just about the most perfect taupe neutral I've ever had on my nails. Ridiculously easy application with only two coats needed for opacity. NYC is one of those surprisingly affordable brands that just takes it to amazing levels when they want to, especially with their creme formulas. All you need is a good top coat and base coat and you can have comparable wear to more expensive brands.
As a random addition, Lemme See Your Peacock from a random drop in at Icing (let's all have a moment of silence for the name). It is nevertheless a great mix of blue, green, and fuchsia-purple glitter reminiscent of peacock feathers in a clear base. The glitter disperses pretty well on application and you can control how much you want with ease. I'd be interested to see this built up to something like opacity, but that's harder with these larger size glitters in a clear base.