I think people should err on the side of including more word types. If an entry has no word types, it’s only funny once; if it has lots of word types, it’s potentially funny in many different ways. Tonight I did vote up an entry that had only one word type, but only because I thought it was hilarious, and I still feel kinda guilty about it.
Sometimes I’m tempted to take someone’s entry and re-submit it with the words replaced by word types…but that would probably be wrong. Log in to see images!
Personally, I think it depends on the entry. I’ve seen some with no word types that are hilarious, and wouldn’t really work well with any. I vote those up. If there’s a funny one with no word types that could easily have them, though, I’ll vote it down.