After reading some of the posts in this thread, I think I understand the solo rider mentality now.
This past Sunday I joined a group of riders that I ride frequently with from Moorpark to Pismo beach. The group had 15 people ranging in age from 50 (me) to 75 years of age. Mostly Goldwings, cruisers and some ADV bikes. We never made it to our destination. Frequent bathroom breaks, arguments, traffic, blah, blah, blah, turned an awesome day ride into mush. Maybe I'm too sensitive, but I only get one day a week to ride, and want to have fun. It's no longer fun riding in a group to me. The guys are great, the camraderie is awesome, but riding in a single file looking for the other guy behind you 99 percent of the time is taxing.
I understand that riding in a group can sometimes give people a false sense of safety and security because help is there if you need it, but the fun factor is lost... Maybe if I find only one other riding buddy things might change.