[MENTION=5639]JocktheMotie[/MENTION] and [MENTION=6005]Mace[/MENTION] -- you guys I think have the best guesses at the character list here.
Mace (the character) could go either way (xSTP), but he has a kind of IT rigor about him, ESTPs are generally more outwardly directed than the way Mace involves himself.
I see both guesses of Pinbacker as viable. Is his outward aggression / attempts to control an internal vision gone mad, or is it simply part of his natural bent out of whack? Hard to tell.
Trey's an INTx tossup; i think one problem with genius is that it can supplant personality past a certain point; we can all agree he was very high-strung and couldn't handle his own mistakes/failures well, due to a lack of intrapersonal/emotional core and being little more (functionally) than a human calculator.
Searle's type was ambiguous to me, but ENFJ actually might be a decent read; he's type A in his own way, and has both extrovert and introvert traits, seems to connect with each crew member easily, can provide clear feedback to them, has developed a decent rational approach to problems especially in regards to the personnel... he knows exactly who is best suited to resolve a particular problem and he doesn't treat himself any differently than he treats others, even when it leads to the culmination of his own journey.
The other crew members all seem pretty straightforward to me (especially Harvey... he was kinda channeling ISTJ archetype, there... both good and bad, whereas Kaneda is far more mature and balanced).