>>1152327I agree, also i believe that road biking helps you be much more competitive as a mountain biker fitness wise, and mtb helps you build skill which make you a batter roadie.
The initial transition if you haven't done the other before seems like to would be harder going from road to mtb and trying to hit intermediate trails off the bat. Roadies who do this that I know seem to take a long time to realize the extent to which the mtb is capable of taking abuse and rolling over obstacles.