[b]Nemaisare[/b] That's kinda what I meant to be asking. Are those kind of "not the friend of the king, but interests coincide with the group." motivations and personal situations ok for a character to have.

[b]Maxwell[/b] I think my tone was a little bad in what I was typing. I had just got of spending a while getting my ass beat in street fighter and it was the second time I had to type up the response due to some annoying error.

What I meant was I can think of only a few potential motivations for the characters.

Anybody who is self serving or got their position at court by climbing the ladder isn't going to be motivated to avenge the king. Unless I guess their whole family was killed. Even then only in specific cases.

Anybody who has a family or other people that need their skills isn't going to be motivated to avenge the king. Unless their whole family was killed.

There can be only so many "I was his best friend/guardian and he was all I had but somehow I wasn't present at his death." Before it starts to become strange.

I've thought of a character that is young man who's father was all he had and was killed. Him and his father being courtiers of some aspect. It seems like this idea will probably work, but the whole thing still bother's me a little. 

Revenge solely as a motivator is a strange thing for a group of people in my opinion. Especially on this scale. It's generally considered to be destructive, to the point that those who want revenge generally know that it is destructive but are emotional enough to not care about their own well-being. It just seems to limit the party variety to people pursuing a goal with no real rewards beyond emotional gratification, in a quest that it seems fair to classify as a suicide mission. Which makes it a little difficult to create a character distinct from the others while still maintaining that specific motivation. Throw in the additional qualifier that they need to have known the king personally and you end up with a potentially even less diverse group. 

Mostly that paragraph was me trying to work out and put into words why I think I was having trouble coming up with a character who's motivations made sense. It's probably just me making excuses so don't pay it too much mind.

Anyways I didn't mean to dismiss the motivations of people's characters, from what I have seen most people's character's motivations make sense and fit well with their personality and back story. The comment I made about self-destructive and petty were more about potential characters I was thinking of more than anything else.