I hope you prove the doctors wrong. Most of the ones I know are anti-motorcycle so they don't know it all. If you decide to go to Yellowstone, Beartooth Pass just north of Yellowstone is THE ride and the Chief Joseph Scenic Byway to the east of the park is great. You're on top of the world when you're riding Beartooth.

I hope you get to make all the suggestions from all these guys more than once. Good luck and have a blast!