Pro started this. Grimm and Sammitch followed it up. Now it's my turn. This is how I plan on writing the characters based on how I perceive them through my own mind's eye.
Grimm: Big, street tough, and a down and out brawler. He's got size and strength and uses them both to his advantage. There is a golden heart underneath that undead body. He connects with some people more than others for various reasons. That said, he still prefers to keep things to himself. Maybe it's because of his former life as an enforcer. Maybe it's because he just doesn't feel like he truly fits in because he's dead.
Mxy: A lot of power with little real understanding of how big of a deal it is. His power to manipulate reality is so natural that he thinks little more of it's effects on the world than we do a sneeze. He's connected to Mick's mind, and I see Mick as being very childlike in his demeanor. Therefore, Mxy is much more so. Though he does good with his powers, it mostly seems to be for his own amusement.
Mick: As I said before, he is very childlike in my eyes. He's that guy you know who never really grew up. But he's slowly doing it. He's shown that he's mature enough to make a commitment, or is it really just that he thinks he's mature enough for matrimony? But the biggest example of his growth as an adult is Mxy. Without a sense of the moral codes of humans, Mxy relies on Mick to be his guide. Mick is now an older brother type character who tries to imbue Mxy with what it's like to be human and value life. And Mxy acts the little brother part by being annoying when not allowing Mick to have his body back and must be tricked to do so.
Priest: Don't have much on him yet. So far, he's Bishop from X-Men. I, like Pro, don't like Bishop. So I'll probably mureder this character later on.
Raptor: An original MBLer who longs for the old day. The team before him is not the one he knew, so he feels a little out of place. Being the guy he is, though, he easily accepts that things change and tries to go with the flow. He likes being a hero (maybe it has something to do with receiving the same rush he felt as an athelete during the Olympics) but yearns for a simpler life. I really do think that he'd give it all up for a chance to be a normal father to his son.
Phil: Dirk sees too much of himself in Phil, so he doesn't trust the guy. I'm not too happy with the flip-flopping personality that Sammitch has given him so far, so I'll wind up giving him a little more solid foundation. Since he has no idea who he really is, I see Phil not wanting to give away what little he knows about himself. He's secretive, yet he slowly pulls out all these unpredictable things for the rest of the team to see (like the cars, for example). I see this as somewhat a childish game. He likes to confuse people and keep them off guard. It's all a ploy, and Phil is laughing to himself the whole time.
Chance: Ripped from his own reality, Chance is stuck in a world that is almost a mirror opposite of his own. He no longer has the pull over the group that he did in his own world. Instead, he is constantly trying to find his place in this strange land where his true love is marrying another man. At times he's bitter. Others he gets depressed. But he is slowly building his life together here. The depression is less, and the bitterness is almost gone. But he will never accept this world as home. His mission in life is to restore the balance, bring Pete back to life, and return to his own world.
Grissom: This guy is out to have a blast. He put his mercenary life behind him and started a security business. Though the money is good, it just doesn't fulfill his life. Even having girls constantly on his arm isn't enought to keep him happy (though it does destract him for a while). He needs the adventure. That's why he tossed himself into the MBL. His globe trotting days are far from over. He's Indian Jones meets Nightcrawler.
Ameristar: She's a chick in armor. She likes to get in the middle of everything. Seems nice. That's all I've got so far. I don't plan on writing her much.
Drax: He's new, so I don't have enough material to do anything yet.
Tobias: Are you really planning on rejoining the team, or were you yanking our chain? Anyways, I need to go over some back issues to understand your character. I'll do that as soon as I have the chance.