OMG my favorite show in the entire world. I agree with you on Casey, Morgan, and Ellie. Some of the people you didn't list (I'm guessing you haven't seen enough of them yet or they haven't shown up yet since you're not that far along):
General Beckman - ESTJ
Bryce Larkin - ESTP
Jill - INFJ? INTJ?
The Beefcake (Cole?) - ESTP
Ted Roark - ENTP
Orion - INFJ
The rest of the Buy More gang:
Anna - ESTP
Emmett - ESTJ
Lester - ENTP
Jeff - ISTP? He's so messed up it's hard to tell what he is.
(Also, it cracks me up that Jeff and Lester form a band called "Jeffster," and I've noticed that one of the more prominent forum members here goes by that username =P)
Chuck - ENTP (an older Seth Cohen version)
I actually thought
INFP. The fact that he worked at the Buy More for FIVE YEARS without doing anything to change his situation implies strong Si. INFPs get stuck in Fi-Si ruts, but I have a hard time seeing an Ne-dom sticking with a job they hate for that long.
Plus, a big part of the show is just how "F" Chuck is and how feelings don't have a place in the T spy world. As for specific examples: In the last episode of Season 2, he tells Morgan, "Follow your heart buddy, our heads only get us into trouble." Then there's the episode where an old gf of Casey's shows up and Chuck basically hounds Casey into having a heart-to-heart chat with him about her. I have more examples of Chuck's F-ness, but I'll stop here for now. =P
Hmm ... now that I'm thinking about it, I guess I could see ENTP, but his function order must be something like Ne = Fe > Ti. lol.
I thought
ISFP for her. She makes a lot of T decisions because of her training, but she's an F at heart. As the show goes on, you'll see that it's second nature for her to take Chuck's feelings into consideration when they're on missions, even when it's not the efficient thing to do. She and Casey are foils for each other—he's all about the mission, and while she tries to be all about the mission, she can't help but take into account the emotional states of the people involved as well. Plus, the way Yvonne Strahovski plays Sarah, you frequently can see the emotion shining through her eyes even when she's trying to act tough.
Definitely an introvert (this becomes clearer when you see the high school episode flashback =P). And I figured SP because she's a very physical, down-to-earth person.
My vote was for
ESFP. Capt Awesome is so sweet and genial and really kind of naive in some ways. I mean, there's an episode where he voluntarily loans Morgan $2000! What kind of T (or any sane person for that matter) would trust Morgan with all of that money? =P
Oh god, Big Mike is a hard one. He barks like an ESTJ, but he's so frickin' lazy ... he's a conundrum: super devoted to the Buy More, and yet it's a running joke in the show that he never does any work and frequently plays hookie to go fishing. I don't know ... are there lazy ESTJs out there?
Hmm ... I feel like I'm forgetting some characters. I hope more people chime in on this. I love this show so much. *wistful sigh*