I hate how Metalocalypse overused him as a character. He's hilarious when used sparingly, but his character doesn't have enough depth to use him as frequently as they did. The Simpsons did the same thing with Disco Stu.
Granted, I was basically thinking the same thing, but sorry to ruin your joke, but why WOULDN'T Hunter Biden be there? A grown son can't visit his father at his home?