I vote for Bibs! I have a bunch of mountain bike shorts that I wear for the right occasion. I was embarrassed about tight shorts and would wear them on the road. They all seem to be cut a bit smaller and they certainly are not any cheaper than bibs. They are not comfortable for a long ride over an hour. Seems I spend most of my time out of the saddle when mountain biking, so they aren't built for riding and sitting for long periods.
Take a look at these
Performance Ultra Bibs They are on sale for 59.99 and are ten panel and really well made and comfortable. They fit like they should in the size they are marked. I haven't tried other brands that cost well over a $ 100.00 like Pear Ozume or others. They may be like riding naked with support, but the Performance Ultra Bibs do just fine for me.
There is always BPD's - Bicycle Padded Depends
They let you ride without worrying about that "I gotta go feeling."