I live on the edge of the New forest and have been toying with getting a hardtail MTB for riding trails and generally just bombing around. My intention is to build the bike (rather than buy pre built) and so spread the cost and also learn as I go. I'm looking at building around an On One frame and they have a good deal on a Fatty Trail frame. What are people's thoughts on having a fat bike as your main rather than a standard 26 wheel based frame?