This is hard. I love Spice (Bobbi Brown) is wonderful, I think it is the most natural color I've ever used. I love MAC's Format and I just picked up Pinch Me and I think it's a soon-to-be fav. Teracotta (Prescriptives) is also great.
I just got Dollymix and I love it! It gives me a nice, natural, glowy look without being overpowering. I usually stick to the sheertone formulas since I'm pretty pale (NW20) but I've found Desirous is great on me too.