I love MAC for certain things. What's odd is that I don't like them for the dramatic look you often see in their advertising...and I don't like them for everything. But for certain basic, staple items, I can't imagine what I'd do without MAC.
Some subtle good shadows...Vapour (this is white with a little bit of pink in it) and Shroom (champagne-y tan). If you line with shadow, there are some good shadows for that...Sable, Mulch and Sketch (all basically deep brown shimmers...Sable is reddish, Mulch has gold, Sketch is more burgundy).
For a crease, Trax isn't bad. It's medium purple with gold shimmer and a burgundy tinge.
Some other popular subtler shades that I've never tried...Yogurt (matte light pink), Haux (matte brown with a rosy tone), Mylar (off white matte), Amber Lights (warm yellow gold)...
But again with the basics...MAC has a few of my holy grail makeup products. Blot pressed powder, Powerpoint eyepencils (especially Permaplum), Lustre formula lipsticks (these are sheer to quite sheer and moisturizing), Blushbaby blush (natural rose brown matte)...
And that is just the beginning. There are quite a few MAC items I never got around to trying, that show up on others' holy grail lists (MAC paints, fluidlines, certain eye kohls, etc.).