Borgon is a biker clown. Just look at the way he's dressed. He's also in my mind an old dude that's stung out on meth.
Borgon is one of the clowns I always take. He's big, tough and hits really hard (when I don't roll a tonne of 1's for damage). His demented laugh is great for lowering the defense of an enemy (take that Batman). In the last game I played with him he pulped Alfred. His sturdy rule makes him that little bit harder to slow down. He has the brutal rule making that critical hit that little bit easier to obtain. By in large Borgon does me proud (except when I'm having a case of the 1's).
Who's next in my rogues gallery? I'm thinking Solomon Grundy.