My best friend is a walking rock and roll encyclopedia he knows absolutely ever thing about the history of rock - like if you ask him about a song he could tell you the lyrics the name of group the name of the band members and the instruments they played. Then if you let him he'll start going on and on about other things like # of record sales - recorded labels - who is alive or dead - there wife's or widows name - and so much more. What I appreciate about him is sometimes I get a craving to hear an old song but I can't find it because I can't remember the name or the band but if I hum a few bars to my friend he tells me who it's by then I can google it. Cheers!