The Final Fantasy and Dragon Quest franchises are right up there in the top 3 bestselling rpg series of all time, and the sales data for Square Enix's cash cows have just been released in a corporate strategy meeting apparantely. Mooo....those are some fat cows hehe
Pokemon is the best selling RPG franchise at the moment, with recent release Platinum keeping the sales going, then Final Fantasy, then Dragon Quest, with the remakes of the Zenithian trilogy - IV, V and VI (yet to be released) bolstering the sales.
This is pretty interesting too;
I have all the main Final Fantasy games apart from IX now, and a few of the spinoff games...I must have spent quite a bit on them now, but they are awesome so I dont regret it at all lol!