Instead, what I ended up doing was just dumping every song I could think of that I like, or might like at some point into a giant play list of 3000+ songs.
On the plus side, it means I can hit shuffle and have a personal radio station of just music that I like. The down side is that it's like having a personal university station, where Tommy Dorsey might cross-fade into Killing Joke.
That said, I enjoy the eclectic mix. I don't need to worry about getting bored with Pantera when, likely as not, Michael Bublé will be on next.