I try to include a variety of styles in the Name That Tune games, and I try to include a reasonable amount of recent stuff. I've been finding it difficult to include much hip-hop, though: first, I try not to have clips with verbal vocals, because they're too easy to guess, and hip-hop is heavy on vocals and light on instrumental breaks; second, a lot of hip-hop is built on samples, and that's confusing for the players.