Course "era" is entirely subjective and likely based on what you were gaming on at the time. Regardless, which RPGs do you feel defined the genre in each time based arc of the genres history? Did FFVII define the late 90s or was it Baldur's Gate? How about Tales of Symphonia for the GC/PS2/X-Box or was it KOTOR? Which game, for you, defined the genre in each era?