What Gary said. I have nearly 4000 songs in my collection but probably use only about 100 of them at any time. It gets rather boring to be truthful but like Gary said, I am there to play what they want to hear, not entertain myself. That said, I use three different keyboards, PA4X, SD7, and a Tyros 4 for gigs, and that keeps me entertained as well - something a bit different even with the same songs.

Deane