For me it's seeing the same tired 'arguments' being trotted out again and again and recognising the hand of a Hovind or a Ham. It's like Groundhog Day. In fact it's got to the point where I know what they're going to say while the're still saying it, though that could be my powers of prophecy exercising themselves again.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'