I did not realize the Who did all the CSI themes
I am totally ignorant when it comes to rock groups. The only group I can id when I hear them is the Beatles, All the rest are just I like that or I don't like that.
I think it must have to do with what you listened to at puberty. I can rattle off the names of most groups from the 50's and a few from the 60's when I hear them but once I started working for a living, it just became about listening to music with no particular interest in who the performer was. I like a lot of rock music but my tastes lean more to folk and blues.
I have never been into buying/collecting music other than some classical/opera albums.