>>132791292See that's what I thought was interesting.
I chose the green ending since I thought the next evolutionary step with combined synthetic and human people was the best solution, but I've seen people put the destruction of all synthetic lifeforms up on youtube as "The Best Ending".
There were several discussions going on at points in the game with both the Geth and Edi, where the subject of wether or not a self-aware AI had the same rights as a living person or not.
I ran with that, especially after the cutscene where Shepard herself wonders if she's a living person or just an advanced AI.
I think it's interesting that people have different perspective on what's "right" in this regard. It's kind of like religion in a way.