It's very interesting to read all these replies. I personally don't _generally_ find makeup prettier at all. More striking, but also more fake and therefore often less attractive. I tend to like no makeup photos as much or more than ones with.
In fact, I tend to be able to gauge how good a movie is by how much makeup they put on their female actors, depending on the situation. When a post-apocalyptic warrior looks like she just got out the beauty salon, or a medieval maid looks like she's about to go out on the catwalk, then it breaks both my suspension of disbelief and my enjoyment. I want to see the actress, not the makeup artist's work.
Which isn't to say I'm trying for tons of flaws in my artwork, either. At least not so far.
My
Lady Rose is my first character, so it's hard for me to say how much I succeeded in what I tried to do. I gave her a default base that was her without any makeup, and therefore some variation in pigmentation on her skin, darkening and reddening around her eyes, and other aspects that I found in my references for her skin tone. I used both photo resources and hand painting to try to match the bare-faced references I hunted the web for. I tried to balance realism and artistic effect in both her texture and shading. Then when it came to make up, I looked for whole faces I liked. So I didn't end up with interchangeable lips and such. Each set is foundation, brows, eye shadow, eyeliner, and lipstick together. The last one I used Liv Tyler's Lord of the Rings makeup as a reference, because I thought it was a perfect balance for fantasy renders.
I also made the brows a separate mask. V4's extra geometry makes morphs more problematic and would probably mess up SSS shading in Superfly. Cycles has an issue with transparent areas in SSS- I contacted Brecht about it and it can only be fixed by using the new random walk method that Superfly doesn't support. And just in general, you don't want to add geometry when you don't need it. It was dead easy to setup both Firefly and Superfly materials with a brow mask that allows my Rose's brows to be any color you want them to be.
I made Lady Rose the type of character I'd want to buy. I pretty much never find one that has a bare-faced option that doesn't look airbrushed, and I almost never never find one that has brows that can change color to match hair.