I'm an old roadbike *and* mtn bike rider who'd fallen out of practice and gotten way out of shape. at 225 lbs, I was too heavy for my full suspension mountain bike, AND for my old 1970s all campy road bike... so I was riding a cruiser I'd fixed up as a 7-speed to get back into shape, only the cruiser frame cracked (crappy 13/16" seat post and a seat tube that was too thin and stuck up too far above the top tube), so i built up a hybrid as a bike-trail-n-round-town special to start doing 15-20 miles a few times a week to get into adequate shape that I can consider mountain biking again. I'll probably keep the hybrid, although I'll likely be swapping for better wheels and maybe a lighter aluminum frame at some point, as it makes a great town-bike.