Well, I'm probably more of a roadie who rides a mtb than the other way around. The road bikes get about 90% of the use. Primarily, mtb'ing for me is a social event....I don't care to go alone in the woods (whereas I do road rides alone and commute to work alone). Because it's a social event, it takes planning and consensus (and driving to the trailhead). Therefore, the regularly scheduled group rides from the LBS or easy road rides right outside our front door usually win the day.