I'd like to ask what bugs there are in a game that help players, but I can easily see this becoming a "list" question (albeit a limited one).
For example, I have just seen in Civilization 4 that your trading partners may refuse to trade an item with you (if you ask, "What will make this work?" and they reply, "I can't see how this will work" (i.e. nothing)) but if you then ask them to spare it "for a friend" they sometimes reply, "always happen to help" and give it to you for free.
Is it appropriate, then, to ask, "What bugs are there in [Civilization 4] that help players?"
I hope so, because I can see this being a really useful question!