The five \"main\" characters, Andrew, Maria, Jackson, Jeremiah, and the Auditor, all seem somewhat cliche.
Andrew is the \"standard\" revenge-seeking, got-nothing-to-lose character type. He has witnessed a terrible disaster that leaves him homeless and with a thirst for retribution. He\'s basically the go-to character for a sci fi story.
Maria is the good old sexy female who serves as emotional support, which is another \"standard\" character type.
Jackson is the all too frequently used \"bad-ass\" who doesn\'t give a sh*t about anything and is a mindless killing machine.
Jeremiah is the cliche, extremely intelligent side-kick to the main character.
The Auditor is practically every other semi-evil evil guy. He\'s a manipulative know-it-all who has hidden motives, and he will almost inevitably betray the main character after trust is built.
Andrew- Obviously has some violence and alcohol issues, loves his crew and friends but cares too little about his personal safety, and is fairly numbed to violence against people he is angry against, lacking (ironically) as strict of a moral code as you would want. But he\'s friendly, (as stated) caring, and does take care of things with humanity, he is not heartless, and he\'s a character you can root for (most of the time).
Maria- Hasn\'t actually given much moral support. In most cases has berated other crew members for a lack of performance or disagreeing with a moral or ethical issue. Also has a complete lack of sexuality despite her appearance; Something that isn\'t often played (well).
Jackson- I made it clear that he has an intense care for people, and indeed gives a shit about a lot. He is protective of maternal and paternal figures (hence Andrew\'s mom and Andrew himself) which is an issue relating to what happened on his homeworld (go read back a few chapters). Intensely cares for crew members, and even though he\'s heavy handed he will go to any length to sacrifice himself to keep others safe. And it\'s not that he doesn\'t give a shit; He is simply filled with anger.
Jeremiah- Yes, extremely intelligent. Also a complete introvert. But consider that at any time, he could take over nigh every piece of technology aboard the washington using the projected synapses he has with technology; It would tax him greatly, but it could be done. What does that say about his personality? About his code of ethics? He acts on a higher level of ethics than you see up front.
Auditor- Is he evil? Is he good? He\'s neither. He\'s at times lawful evil, or chaotic good, or even true neutral. It\'s not a thirst for raw power; It\'s a thirst for information and influence.
If you really dig into it you can derive the psych of all the characters, but you have to consider all the points and relations. I doubt anyone put together what happened to Jackson and how it is related to how he treats Andrew and his mom. Or the bit about Jeremiah and his respect for machinery. Or even Maria and how she is far more cynical and intelligent on a tactical level than Andrew and the other characters.