NARS - blushes, illuminators, eyeshadows for the vibrancy of their colors, eye paint used as gel liners...smooth as butter, and glosses on top of just about any lip color I own. This brand has seriously changes my life.
Tarte - the blush in the cc palette is PERFECT for me, as are the eyeshadows and I LOVE the LipSurgences.
Surprisingly (to me) I am currently loving on Estee Lauder. The matte shadows in the Bronze Goddess palette turn my eyes into works of art. And the Pure Color Eyeshadow trio in Beach Metals makes a certain gentleman friend comment on how beautiful my eyes are every time I wear it. In fact last time he saw me with these shadows on, he made a comment that some days I just look radiant...THIS is why we girls buy make-up!
Not a favorite brand yet, but I have just started exploring the Milani line. So far every blush, lipliner and lipstick I have tried I have really, really liked.