I agree, I wouldn't dream of handing Legion in to Cerberus.
I've got 3 or 4 games to import, mostly Paragon, one Renegade. All male, I haven't been able to bring myself to run a Femshep the whole way through. I'm just more comfortable and feel the game is more believable if you're a man, plus I prefer Mark Meer over Jennifer Hale even though a bunch of people seem not to. It depends on the line who delivers it better, really.
In all of them, Wrex is saved because I'm a biased Wrex loyalist, and Urdnot Wreav is dull as shit regardless, Legion was kept, and Grunt was let out of the pod. Kaidan is killed is all of them instead of Ashley, except for one of them just to change it up and see if there's something different to get from keeping him alive in ME 3. In all of the Paragon ones, everyone survived, which begs the question of why I did more than one different playthrough. In the Renegade one, the one I just completed a few days ago, I killed off Jack and Mordin on purpose. Jack because I just didn't want her around, and Mordin, as Ric Flair would say, with a tear in my eye, because I couldn't accept that the original Mordin got replaced. I HATE re-casts and from what I saw during the demo, he made Mordin boring and I just decided it would be better to leave his memory in tact. Fucking stupid to replace him, best character in the series behind Wrex by far. I might just change Jack and Mordin surviving in one of my Paragon playthroughs because that re-cast really bugs me, and even though I'm using one playthrough with everyone alive, I won't want to do it after that.
I don't remember what I did with the Rachni all the time, I think I may have changed it up. I know for sure they're gone in the Renegade one, and in one Paragon they're definately saved but I forgot which one. I know I did both, I just think I might have killed them in another Paragon one. Who knows.
Can't wait. Game of the year 2012, regardless of what the Spike tv awards say when Rockstar bribes them to pick GTA V.