I hate liquid foundation, but I've had to resign myself to the fact that powders are drying and nothing creates a base for other face makeup (like blush) like a liquid foundation. So I've been on a quest for one that doesn't feel heavy.
I had given up on Nars because all of the light shades were wrong on me (too yellow or too pale, or just wrong looking). None of the sales associates were ever willing to try me in a medium shade, until I happened to show up at the Nars counter when their regional makeup artist was there.
He took one look at me and gave me a sample of Santa Fe (one of their medium shades). It actually isn't much darker than the "light" shades, but it's a lot more neutral, and perfect for me. Healthy looking (i.e. not overly pale) but doesn't add any color to my skin tone. I'm surprised I could match to a medium shade, but it works!