There are two types; Classical, and Theater. They`re fascinating instruments with a lot of history, and international fan clubs. Check-out the Theater organ page for info. If you have a music service, take a listen to some George Wright on the Mighty Wurlitzer pipe organ; I recomend "Tea For Two", and "Honky-Tonk Train" for anybody who thinks a pipe organ can`t rock! .....It`s all in how it`s played. Virgil Fox did some wild classical concerts in the `70s on his Rogers touring electronic pipe organ, with light shows, and a red-blooded interpretation of the music of Bach. Listen to "Pasagalia And Fugue in C Minor", and "Toccata And Fugue In D Minor" for some good examples of all-out classical jams that will give you goose-bumps. There really are only two types of music: good, and bad. Over-all quality and a feel for the music are key.