Boss fight difficulty aside, David is the silliest-looking skeleton in existence.
For one, he's not even wearing his Elizabethan-era clothing correctly. He should be wearing leggings underneath those puffy dealies. Also, his name is David! How unspooky is that?
It's like he got out of bed, forgot to put pants on, and said, "Here I am. Let's fight. Or play music. Whatever."