i wouldn't consider me2 an rpg...it has rpg elements, but it's primarily a fps in gameplay, in overall concept it's like most of the rest of biowares releases (i love bioware btw)...a story you play through. Even most FF's tend to be story more than role play driven. You're stuck as the people they choose for you.
Dragons Age should have been open world...it wasn't, fails as an RPG for that reason and quite a few others. Oblivion, Morrowind both have the elements of RPG's the only thing i disliked was the leveled lists(and oblivion being dumbed down for consoles). And my opinions are not the case of what i was introduced to first. rpg's have been my favorite genre...and it does seem they're dying or being replaced by mmo's.
Main quest, side quests, open world, choices, paths, possibility of getting your ass kicked if you wander into the wrong place, hidden things, hidden places, making allies, making enemies, interaction with the enviroment and the population of the world, treasure, leveling and getting stronger, skills, magic, tech...most everything that mmo's do now...
Kinda depressing writing this, i would like to see a good standalone rpg come out...and while i wait...i play mmo's :/