I was thinking the other night about creating a table for monster morale checks based on a d20 roll. As well, rather than having to look up a specific monsters morale, I would just use the hit dice to add a modifier. Generally speaking a higher hit dice monster, is going to be tougher (and not always, but smarter).
Now obviously this might be a bit swingy, I am going to playtest this idea out in my own game. The basic 2d6 morale check in Swords & Wizardry Fantasy Adventure Game is perfect for me for the most part, but I thought "hey can I do everything I need to do with a d20?"
So here yah go, give it a try.