Mountain biking (especially at speed) requires a lot of technical ability. I ride with a lot of more road specific riders, and the technical rock sections are where they have the most trouble. They are blazing fast on groomed single track, but when it gets choppy...they slow down tremendously.
The two ends of the spectrum really compliment each other in a lot of ways. Hopefully, I'll be able to really increase fitness levels, improve my pedal stroke form and find another avenue of pedal induced propulsion that I can become obsessed with!
The truth is...I enjoy riding anything I have to pedal...and new bikes in the garage are always welcome! Thanks for the responses...this is going to be a fun project.