I love any of the dark purple tones - Russian Navy, Siberian Nights, Black Cherry Chutney, Lincoln Park After Midnight!
Colors - A True Ab-Original is fun for summer. Big Apple Red is a nice bright red. Elephant-astic Pink is the pink someone else mentioned earlier from the India Collection, which I LOVE. And I love putting Yo-gatta Get This Blue on my toes!
I really want to try Give me a Coral Sometime, which I think might be from the
Mod collection, and Louvre Me, Louvre Me Not from the new France collection!