|On the Media mentioned a study about which internet links are shared the most:
Yeah, and the number one predictor they found was anger. Anger is the number one predictor of an article making that most popular list. And it's not just anger; it's any high valence emotion. So humor is one. Awe is another. But let's look at the emotions that aren't viral. Those are emotions like sadness or contentment or satisfaction. They're not in the interest of the media creators to propagate.Here's a NY Times article that talks about it.