Jim.
Nothing weird about never experiencing burunout--I've never experienced it either, and I'm an old timer. Cole Porter once said "When someone asks me how how often they should practice, I told them to practice every day, and when they think they've practiced enough, practice some more."
I sincerely believe, however, that one of the best things I done in recent years was to put my mind to working on Gig Disks. Just firing up all those new and wonderful style files were an inspiration that allowed those creative juices to flow. For anyone that has the feeling of being in a musical slump, I strongly urge going to
www.psrtutorial.com and downloading some of their huge storehouse of stle files. Then fire up the keyboard, select a style, and play the first song that comes into your mind. If nothing stirs, this is probably a good time to sell the keyboard and buy a good set of golf clubs.

Gary