About 40%, maybe. I use non-mac face products (foundation, primer, powder, blush, etc). I also have a slight obsession with YSL eyeshadow compacts and lipsticks. And I have a huge amount of lipgloss, none of it Mac (mostly Bare Minerals, ELF, Lancome, Burt's Bees, NARS, etc). I do have more Mac e/s and l/s than any other individual brand, though.