Unique names for each PC are necessary. But easily recognizable names are important for daily operations, so that each user can determine which PC they are accessing over the network. Even if there are only 2 PCs on a home network, it's important to be able to easily tell which PC is which so that shared files or resources can be accessed.
I enjoy hearing these various imaginative naming schemes. Makes me feel less weird that I've put some thought into my own PC names over the years.
My desktop PC is called The Beast, because it's a home built monster. It used to have a custom case that I built for it out of a printer table, but these days it's in a store bought Smilodon case, so the name is still fitting.
Owing to my screen name, my laptops have all had names that play off of "WillCAD."
My first laptop was an IBM ThinkPad. I called it WillPAD.
My next laptop was a Compaq Presario. I called it WillPAQ.
My current laptop is a Gateway Tablet PC. I call it WillTAB.
My home network is called WillNET.