I think all sorts of music are cool in their own way. If I like it not, doesn't matter. Basically like dappled said, its interesting to me how things evolve, like the music, cinema, all that stuff. Very interesting.
Music, like humans, is about evolution. It's nice to know where we came from. Whether that's ragtime, Chicago blues, rock and roll, The Beatles, Aimee Mann, or Homo Habilis, Ergaster, Erectus, Heidelberg, Neanderthal, Sapiens.
Ragtime is hilarious, I love listening to it. The same with lounge music, I wouldn't go out of my way to learn about lounge artists or buy CDs but I would put it on on Youtube if I was in the mood.