I found him to be hostile and combative, always looking for a fight. It was the same over on MercedesShop, where he got himself banned much faster for basically the same behavior.
...Oh, snap. Wow. That actually makes me feel a little better. As much as I disliked the guy (I didn't know until this thread that it was the Proud Dad response that got him 86'ed), I didn't take any joy in knowing that for the past hour.
It's actually somewhat of a relief that his problem wasn't with anyone here in particular, but with the world at large.
The internet is the weirdest place I think I've ever been.