One thing that always fascinated me is that although BBSs connected people, they were necessarily constrained by distance given the difficult (and price) of long-distance calls. That reflected on the shape of the community around it. There were some things that would be common between them but overall different area codes had very different scenes. This is somewhat diluted today, since you can connect with whatever c…
The same goes for all the other software. In some areas LORD was _the_ BBS game, in others it was unknown. In my region BlueWave was the standard offline mail reader, in others only QWK or even weirder formats were the standard.