Way to many to pinpoint your desire...check out the channel listing on the sirius website if you don't have it. Hit and miss til you find what hits your fancy.
My Fav is 22 but that because I was an 80's music junkie...
Wife has XM in her new car but I haven't found one to satisfy me quite yet.
Here's alink to their channel guide....channels (http://www.sirius.com/pdf/channelguide.pdf)