I've played Dragon Age: Origins and Dragon Age 2 and all I can say is that months of time have been spent on trying to get all the possible endings and unlock all the content that's in those games.
Personally, I find that the Assassin's Creed and GTA franchises have been milked to death.
I couldn't even find the motivation to play AC3 all the way through.
Bioware, on the other hand, just seems to make hit after hit.
While I can only speak for my own preferences, getting the new Dragon Age would be definitely worth it.