I think my understanding of Forgotten Realms, and of the concept of fantasy as a whole, is steadily improving and increasing.
I realize more than ever before that any one fantasy role-playing game/rules system, setting, etc. is just one possible intrepretation of fantasy. Other fantasy games, rules systems, settings, etc. may be very different. The same terms may mean very different things in different games, settings, etc.. Different terms in different games, settings, etc. may mean the same thing or something similar.