I just love nude lips! Almost all my lipsticks are nude. My favourite nudes are Hue, Myth, Fleshpot, 1N, 2N and 3N. Pretty please, Freckletone and Peachstock are good too.
i'm nc25 (now probably nearing nc30) and i really like 2n, but only applied lightly otherwise it makes me look like a ganguro girl...same with fleshpot, i have to apply a slightly coloured lipglass over it to make me look normal. i like myth because it's kind of pinkish on me so it doesn't really need a gloss to go along with it. lovedust was one of my first mac lipsticks, and i still dig it though i never wear it anymore. honeylove is a nice nude for me, it just kind of takes away the red tones from my lips and neutralizes them which is pretty sweet.
c-thru lipglass is my all time fave nude product though. just a layer of c-thru to pale my lips a little and i'm feeling like a million dollas!