The biggest failure, in my opinion, was how little the choices you made mattered throughout the series when it came to the Ending. But I'm firmly in the 1 is best, 3rd is second best, and 2nd is pretty heavily in last place. 2 had amazing characters and cool sidequests, but it was practically a remake of the first, with little if any overall plot development from the first. As for the sequel. I've sad it before and will say it again, please make it a prequel to ME1. and Please completly ripoff the idea of Dragon Age and make it Mass Effect: Origins. Pick your race, pick your background. Unique starting setting and quests in the game, and make it at least somewhat relevant throughout the story.