Well, I've done almost everything, but I have no idea how I managed to get 76 hours, too (I've completed the first ME in less than 40 hours).
Personally, I think that an rpg MUST be long. It's not only because rpgs are "epic" (I suggest to play Steambot Chronicles, a wonderful PS2 game that isn't absolutely epic but lasted MONTHS on my console!), but also because they're the only genre that can give this kind of experience. To be clear, games nowadays are becoming shorter and shorter, so if I want to seriously immerse myself in some gaming world I only have RPGs.
Steambot Chronicles, isn't that a JRPG with mini-games and a dating sim?