Thank you for the rep points - they are appreciated from one as rep-heavy as yourself.
I like to use a bit from many different brands. I would have to say that most of my makeup is MAC, Bobbi Brown (which is more suitable for every day makeup and not much for stage-worthy stuff), NARS (gorgeous blushes and eyeshadows), Stila, Cinema Secrets, Lancome. I have heard great things about Ben Nye and Make Up For Ever, as well.