Some people use themes for hostnames, like planets, characters, etc. I never had enough computers for that to be useful and my main computer inherits the name of my previous one (which was inconvenient one time when I was still using both on the same network).
Keep in mind name length. SomeReallyCleverName isn't so clever when you realize typing it always requires tab completion.
Good taste in movies, one of the very few AIs who isn't portrayed as mad and dumb.