Plotwise, his initial joining of the team makes sense ... you need to go to a certain place and he's the only one who knows how to get there. Okay, fine ... as long as he follows orders and doesn't go around slaughtering villagers I can put up with his snotty attitude. I've been killing CE thugs all over the Sword Coast for no better reason than because they're CE, but for some reason I'll put up with one in my party. Okay, whatever.
But then, when we get back from our trip into the wild, suddenly he's a permanent addition to the team, homicidal tendencies, lewd comments and all. Say what now? Tell you what, why don't you and the firebug sorceress team up and go raze a few towns so that the rest of us can come along, kill you and take your stuff?
Honestly, what is UP with the writing in this game? And why is it that I'm supposed to be trying to gain influence with the NPCs? Shouldn't they be trying to gain influence with me? They're the ones who keep asking to tag along, not me!