It sounds like you know how to ride a mtb. Road is always going to be dull if you can jump a mountain bike and ride trails at a decent level.
Don't really agree. They're totally different things and I have places for both of them in my life. I don't ride the road bike to jump off things but I've had massive adrenaline rushes when descending off mountains flat out. I would defy any cyclist to get on a road bike at the top of a 15-20km descent and not have fun hooning down.