Best Sci-Fi Games trilogy of all time

I do not know where to start. The Mass Effect games have made my childhood so much better and today I play the 3 games are still very happy. You have for me as an incredible number of advantages ... From the story about the characters up to the atmosphere, I would never be finished with the positive aspects.
Of course there were a lot of the games exposed. Each game has ironed out weaknesses of its predecessor, but added new ones.
The focus has increasingly turned to the action in the course of the series, at the expense of RPG fans, but one has to say that Mass Effect was never a real, typical, purist RPG. It was almost always a third-person shooter with more or less strong RPG elements (depending on the part).
Me anyway all three games (especially the first and third) have totally sucked. It has been almost felt like I was watching a great sci-fi movie, just that I'm playing the lead role in it, and all experience itself.
The experiences that I've done with these games are unique and indescribable and unlike any other game. I recommend it to anyone who is even remotely on Sci-Fi and / or TPS and / or role-playing games and am fully aware of the opinion that anyone who does not play this epic trilogy, has missed something.