I have to agree with annie...road bike. I just have not aquired the skills to squeeze between the trees on the trails and huff and puff up the hills. I will admit when we are camping and I hit the trails in the early morning that it beats that cup of java.
One early morning I was cruising on a trail and a young deer was just off the side of the trail. I stopped and slowly came up to within 6 ft. of the deer and just talked to it. After we moved on another cyclist surprised me from behind and we started talking. He had thought I was cycling with my dog. He mentioned just how wonderful communication and beauty of nature is on the trails. That is when MTB wins out. Otherwise it is speed and distance on the roads.
Crash