Melancholie

Doing my best to be helpful, I'll give you a quick analysis of what worked for me.
Pro:
-- I like the idea that he will give gnomes etc. a fair chance. It's a nice change.
(Though I seldom play as a gnome.)
Quite reasonable done, too. They just need to be pretty enough.
-- I find his a bit high, but I can live with that.
-- His biography is both funny and witty.

Con:
--I'm not really fond of the weekly fee.
As he's a mercenary, it makes sense, but while he's in the party he shares it with all members.
Where should it go? Doesn't it simply vanish, when you use a script?

Neutral:
-- Stats. I find his Intelligence and Charisma to be a bit high, but there might be a reason behind it.
Even if not I can live with it. Just a comment.
-- Korgan is a mercenary, too. He charges only on party entering.

Overall, I rather like him.
He seems to be funny and a bit more reasonable in his goals, money, than most NPCs.
That I like him is admittedly not all that flattering as I collect NPC like other people artwork, but I am
always happy to get another one for my collection.
But it could be a long way until he's done, when you have really planned two quests for him.
Though, don't let that discourage you. Good luck with it.

PS: This post was written rather late. I'm asking for lenience here. Don't kill me, if I don't make sense.

I just wanted to give my opinion, too.
I hope it is not getting too old.
I have voted for for 3+4+5, so twists, evil options and new quests.
That was maybe a bit misleading, because I would like the NPCs,
too, but I am not exactly for new caged ones.
But it might be nice to have the choice.
Admittedly, after some thought (I didn't give it much thought
before), I would probably vote for everything now.
I would wish you good luck, but that's no good for making a mod.
I wish you persistence. Modding is a lot of work.