This is an elaborated 記事 based on my コメント and posts on couple of ファン picks and フォーラ topics here.

"But this is life. This isn't a movie."
"Yes it is, Sid. It's all one great, big movie. あなた just can't pick your genre."

Billy may not have an outstanding personality as a killer but he certainly has much to give as a whole character. I 愛 him to bits!

The shittier boyfriend: The one that fucks you, dumps あなた and doesn't even nake あなた famous, または the one that murders your mom, takes your virginity so he could kill you, and makes あなた famous? That was just inspired によって a line that made me laugh...