I like how you tried to make a realistic version of these characters; just a few nitpicks:
1: It's gonna be pretty hard to make Samos look real. You did a good job with it, but still, it's an old dude with green skin and a log on his head. How real could you possibly make it look?
2: I don't really like that look on Jak's face... He looks like an obnoxious frat boy.
3: Daxter looks kinda like a cat... just distracting...