Inspired by this thread I treated myself to a new pair of mtb shorts and liners from 7-mesh. Expensive, but very nice quality, fit and comfort. I did a 3 hour trail ride in them today and although it was hot and humid, they stayed remarkably dry. Also no catching on the saddle, which is my number 1 issue with mtb shorts. The liners are the best I've yet come across, no running up the legs, not too much padding and cut nicely around my manhood. The shell is super-lightweight too and cut perfectly for riding with deep pockets in all the right places. I would still say quality road bib-shorts are the most comfortable to ride in, but these are far more casual and easily wearable off the bike.