MAC Hue Lipstick
Because my undertone is warm, I have a difficult time finding pinks that will suit my skintone. Pinks that are too neutral wash me out completely and cool pinks look very odd on me. Hue is a bit on the warmer side, so it's a pink that's easy to wear. Also, because it can be worn sheer, it's a great every day color.
It reminds me a bit of MAC Creme Cup, so if you like Creme Cup, I'm sure you'll love Hue!