DOH - forgot about Mat Rags. Sorry.
Mat is sort of a weird placement. He's the only one in the game whose capability for talking to you is utterly random. When you enter within a certain range, he makes a decision as to whether he's going to talk to you or not. You have to leave his range (which is I believe about 5 meters) before he resets to a point where he'll make that decision again. Since what he gives you is a 'bonus' side quest, there's no guarantee that you'll get the quest.
And, 9 is the highest possible score.