It?s a mixture, but my extensive buying, and advice from two friends who are top make up artists, one has recently introduced her own line is that:
For proper coverage, Make Up For Ever HD foundations
Laura Mercier for lighter foundations/tinted moisturisers and primers and Secret Finish, brightening powders.
Bobbi Brown corrector ? but Eve Pearl Salmon is even better, but hard to get)
Laura Mercier for eyeshadows. Bobbi Brown eyeshadows also good to apply.
New MAC eyeshadows hit and miss. Ditto Nars. Sometimes too chalky and crumbly and what?s with the sparkle?
Lipsticks. NARS and Lipstick Queen. Chanel and Bourjois.
NARS Exibit-A blush. Looks scary but suits everyone and much better than Orgasm
Shu Uemura ME Brown 845 grey/brown shimmer eyeshadow. Also suits everyone.
Shu Uemura brushes, Make Up For Ever brushes
Some cheaper brands are also good. Rimmel eyeliners are good, Myface has great dewy foundations. Revlon does great lipsticks and polishes. Collection 2000 does good mascaras. Barry M is cheap and cheerful.