Yes, my group is extremely superstitious about dice and everyone has their own set. I personally have two sets, one soapy blue with white numbers that roll pretty good. They're great for reading in dim light and I use them primarily when playing, or when DMing a light-hearted campaign or something (like Mutants & Masterminds). Then I've got my evil dice. They're black with smoky gold and gold numbers and they're KILLER. Nobody's allowed to touch those dice (which is easy, cause now we play online). I keep them in what my group likes to call a "charger". It's basically a case that you never switch and the dice must stay in at all times unless in play. The longer the dice remain in the case, the luckier they become.
My "charger" is an old polished aluminum pepsi sunglass case that I got with pepsi points over 10 years ago (yeah, I drank that much pepsi. Got a CD case, towels, dogtags, and a t-shirt as well, to further illustrate). It's kinda falling apart, but it serves me well. Among those dice, I also have 4 yellow d6s with black dots that came with the Heavy Gear tactical boxed set, as well as 6 blue d6s with white dots that I got at some toy store (needed lots of d6s for Shadowrun), and 3 mini d6s from various board games that almost consistently roll 6s, which I use to torment my players in Silhouette-system games.
Another of my players has two d20s. One white, and the other black. He calls them Ying and Yang, and they've always rolled quite high. Another player in our group is so unlucky that nobody lets him near their dice for fear of them being tainted (it's happened).
EDIT: Paragraph injection above the forehead