There's actually nothing bad about MAC Riri Bad Girl, apart from the name and tacky white plastic/faux-gold packaging. That's nasty enough, to be sure. (I remember the eighties and the first time all this budget bling made the rounds.) Bad Girl is just a nice prim mid-toned neutral nude. A nude for non-nudists, in that it will tame cool, darkly-pigmented lips like mine without bringing on the blowup doll/ mouthless horror-face. It possibly looks more striking (and certainly more orange) in the bullet than it does on the lips, so don't expect it to rock your world chromatically. Indoors, I'm seeing a tasteful and slightly dusty-pink result beside my very pale Irish-type skin. If you're familiar with MAC Mehr, you're getting close, though that's cooler. MAC Taupe is the same sort of middling tone, but warmer and more ochre.
I'm including quite a few tube pics since nudes are so hard to judge from jpegs. I know a lot of you are going to be dropping serious money on this item from evil resellers so I hope this is a help to someone.
Texturally, Bad Girl is perfectly fine; a nice smooth, non-claggy matte and one of MAC's better efforts in this respect. The colour is very flat and sheenless but if this isn't your thing, a dab of balm or gloss will work wonders.
It's a shame Bad Girl isn't more widely available; almost anyone could find something to love about this shade, from novice pre-teens to hardcore slap veterans, punks to perdy princesses. It's an everyday thing for the conservative and a nice change of pace if you're into a hardcore look. I can't really think of anyone who should avoid it, except perhaps... maybe a very cool/ashy platinum blonde? Might look a bit... dusty. Everyone else should be fine, I'd imagine.
Indoor daylight, unflashed. Colours true to life here.