*Iris Shepard examines thread*

"Yes, I believe everything here is to my specifications. Now Jacob, be a dear and fetch your commander her machine gun. I've got mercs I need to kill."
Anyway, since I'm insane for Mass Effect, I played ME2 three times so far with three different characters (and plan to play it at least two more times):
1) Lyre Shepard = Basically me in space marine form. He's 100% Paragon, a Vanguard and romanced Tali (because I can't resist a girl who's into computers).
2) Iris Shepard = My favorite of the three, because I make a conscious effort to create a believable character. She's Paragon to her friends (most of the time) and Renegade to her enemies (most of the time). Her class is soldier, and she cheated on Kaiden by romancing Garrus, because Kaiden was a total jerk to her.
3) Jason Shepard = Named after
Jason Todd, because he's my experiment in being a complete ass to everyone he doesn't want to get in bed with. He's 100% Renegade, an infiltrator, and romanced Jack, Miranda and Kelly. Sure, that means he cheated on Ashley, but he doesn't really care.
As for the new party members, my favorite is a very close tie between Mordin and the one that's a big spoiler.