Nah, I don't want to be evil just for the sake of it. The choices you get should make sense, they should serve a purpose. I simply want a story that is immersive and somewhat logical. Take Shepard for example. As a Spectre one can of course say that the end justifies the means if the problem at hand is that dire. But if Shepard would be just a callous psychopath, who in the right mind would make him/her Spectre in the first place?. Leave the nonsensical viciousness to GTA or games like that.
Basically yes. What I'd honestly like to see the most is more really dorky responses, like mumbling something random as a password in ME1, but... 
The renegade way to make ceasefire is more believable than Paragon one.
I call my Shepard paragon, but he earned his share or renegade points (though less than paragon) in ME1, because I didn't trust yet the characters wouldn't lie, and because it felt more like the kind of talk certain type of personalities would listen to. In the ending I reasoned with Saren with mix of paragon and renegade arguments - one of my favorite moments in any game ever.
In ME2 and 3 I played as more hardcore paragon, don't remember anymore why. Maybe I didn't fancy the scars (though now I think they're wonderful idea, and during second playthrough I allowed Shepard to become more scarred, though it hardly showed visibly), or maybe more extreme playing style got favored increasingly? (I should play it again soon, apparently.)
Man, am I the only one that still kind of loves the resolution to Rannoch? People love to lambaste it now, but I remember having a ball when I first played it.
Somehow the characters I got killed during ME2 ending happened to be Tali and Legion. And I decided to live with that, convinced ME would be a game series I will play more than once. (I played the whole series at once, being newcomer like that.) Mass Effect 3 with a major party member absent made Normandy feel stangely empty at times, funny how one character can affect so much. After second playthrough everyone survived the suicide mission, and Rannoch events after that, being finally able to promote peace, felt nearly surreally touching.
...Saying this as a person who can't think of AI as actual character. I don't really care about geth, though Legion did good job convincing me (sad death scene in ME2 did help). But taking sides, when you could be talking sense to everyone, would feel awkward. You'd just need more information at that point, and you're running out of time.