I have to admit that when I first read New Moon and Eclipse, I didn't really pay much attention to Embry nor the other wolves since I was pro-vampire way more (altough I never hated the werewolves), but when I was waiting for Breaking Dawn, I re-read the series and Embry became one of my favorite minor characters!
I think he's the quiet type unless he's comfortable with who he's with and where he is. He was shy when he first met Bella in New Moon, but he's joking and loosened up the next time Bella sees him.
He also seems rather calm since his mom keeps on yelling at him and he does nothing about it. I mean, l would think any teenager (including me) would be mad at their mom, who's scolding them for something that she doesn't even know the whole story of. But then of course he's probably so calm and takes the yelling because he probably knows that if he loses control, he'll turn into a wolf and he could hurt his mom.
And, of course, like everyone, I'm DYING to find out who his father is! But I think it's really hard to tell. Of course everyone hopes it's Sam's dad, but it is true that you never know. I don't think Embry ever got mad enough to even try to leave the pack so there's still a chance that Billy's the father! And I can't really think of any reason for Quil's... father or grandfather (I forgot which one...I think grandfather, but I'm not sure), but that one is still a possiblity. I hope we find out in The Twilight Saga: The Offical Guide (I'm so going to buy that!) or someother way!
Hey, did anyone noticed that Jacob said somewhere in New Moon (I forgot where though) that Embry was named after a Soap Opera star or something like that and his life is sort of Soap Opera-ish?

Sorry, I just thought that was a funny coincidence... but that could be just me!
"All you need is love. But a little chocolate now and then doesn't hurt,” -- Charles M. Schulz
...That is the quote to live by