*sigh* I hate to admit it, but I'm far too busy/lazy these days to look at new fanfiction, but I still write and I still have my die-hard faves. Made Nightwing is one of them. (You're welcome, Brendan, I'm pimping your stories because I love you so much.) So...it's pretty unlikely that you haven't read him, but he has some damn good stuff.
Where Eagles Dare,
PREDATORS,
Changing Fate, and
For the Uniform, For the Cause are definitely my favorites.
drwells123's
Recovery is also one of my favorites, it's an AU about Miranda and F!Shep centered around the Lazarus Project. Also,
500 Metric Tonnes of Palladium, his stuff is really quite hilarious. In a good way. It's almost the only time that I've really appreciated Tali-fic.
While we're on the subject of pimping...I think I'm going to also, shamelessly, advertise myself.

I'm writing quite a bit of Mass Effect fanfic lately. My latest is a story centered around pre-game Miranda Lawson, called
Young Blood. I don't believe I have a single finished fic on my account besides
A Broken Frame, which I guess is semi-generic angst for the Shenko pairing. (Hint, it was my debut in fanfic writing

)
I've also got a M!Shep/Ashley angst fic,
When You're Through Thinking, Say Yes, a fangirl appeal to the Garrus fans with
If You Only Knew, and...well, I write my fair share of Lonely Island/Mass Effect crackfics. So...if you're up for it...give it a gander? :3 (Just in case anyone was wondering, I'm a bit of a review ****. To quote KatieKrios. XD)