...ever had to switch Ars Magica out of Mythic Europe due to having too many historians in the same room arguing over the game. (Never mention Fulk Nurat in their collective presence)
...is regularly mistaken (sometimes all at once) for a Hassidic Jew, a Mennonite, and a member of ZZ-Top just due to having a long beard and a broad brimmed hat.
...started out with the Three Little Books of D&D and has never had more than 8 months of gaming off since,
I'm sure their are some others, but I think these suffice