I road ride to train for off-road. So roading is fast, boring and I don't have to wash the bike. I don't laugh and just nod hello to passing roadies. I did The Roses Round last June, lovely scenery but the social aspect just wasn't there, most of the starters just dismissive of us! Finished tho'! Did the Joux-plane few years ago, before breakfast….
Off-roading is much harder and I feel completely trashed after a good day out.
Value for money/fitness/social? Mountain biking!! Actually, I think it's a saddle thang!