people looking for logical consistency in this series shouldn't have started playing it in the first place. I avoided the first game for a long time because I found it looking extremely derivative, cringeworthy and dumb. But then I watched first 20 minutes on Gamersyde, saw Shepard punching the dude into stomach and immediately went online to buy PC to play that game.
Why I loved Mass Effect:
1)I was an important dude who kicked intergalactic ass
2)Music
3)Dialogue delivery - I just finished Vampires Masquerade Bloodlines and was craving for more RPGs with good VA and decent facial animations.
4)Epic scale of my decisions
5)It was my first Bioware game and I didn't know their tropes and style.
6)Shepard looked and act like he didn't give a fuck because nobody in their right mind would act like this being in his place.
See, I don't list "incredible writing", "fantastic story", "deep RPG mechanics" there. What I wanted from this game is to be an intergalactic badass who could control the flow of events, that is all. The first two games worked for me because I was sure that I will see an outcome in the third game. And the third game hasn't delivered it (while dropping the overall quality).
The whole premise about the ancient race of machines looking like ticks is lol-worthy to begin with. If I start deconstructing the series treating it like a good piece of science fiction there will be like 0 things I like about it. Perhaps the concept of Mass Relays is the only thing worth a damn because something like this can hypothetically exist in some form if we assume that we are not the only sentient beings in the universe and somebody had to figure out FTL travelling. I'm sure though that we won't find a race of dinosaurus wearing armor and speaking English ANYWHERE in the universe.