LOL!
His attitude deserves it as much as any neutral NPC I've found so far. You can have a funny conversation with him, though, if you keep him alive after you get through the puzzle and relight the forge.
I bought all the spells from him, and kept him alive for his potions, just in case
I was hoping he'd have somthing interesting to say about the noteI found on hishelper, but nope...