I tried black lips a couple times, but it looked terrible to I took it off imediately. I do have a nice dark, cool red though that is running out and I have to dig into the tube to get any out. I rarely wear it though just cuz it's difficult to eat, and I don't often go places other than school.
Also, once I tried covering my whole lips in lipliner (lipstick was running out) and then covering that in lip gloss (it was nice shimmery stuff too!), but it feathered horribly.