Hell yeah, Kelly and Joker/EDI are awesome. It's pretty sweet how he actually has something to say besides his backstory this time.
Speaking of, they nerfed Tali bloody HARD in this game. I mean... she had a massive shield, shotguns, and her abilities messed robots and shields UP. Now she has that stupid drone that prevents you from using anything else for way too long, hacking, and shield vampirism - which are usually unusable due to that damn drone.
I'm not sure why, but Tali seems a bit less interesting this time, too. Outside of being adorable and shy, I guess.
So yeah, that's lame. I usually brought her and Garrus along with me once I got them - before that I'd just use Miranda and Jacob. I don't think I've ONCE used Jack except for her loyalty mission, which is a shame. Tangentially related, it'd be awesome if we could've had a Biotics duel.
I personally liked Zaeed. Grunt's a bro, but outside of that I wasn't too interested by him. Mordin is awesome by default.
I also liked the crewmen pair in the engine room. After missions and stuff I'd go down and listen to their walk-by banter. Also awesome was the Turian in the entrance area of the Citadel, and the game shop up on the top floor. I still want that Shepard VI, though.