User blog comment:Xaypay/New Headers for the Wiki?/@comment-24669364-20151223120104

They could be promotional, such as for Facebook and Twitter.

As for my favorite, I would have to go with the McJokerNuggets one, although that is just my opinion on which one is my fav, i'm not speaking for the majority of the community. Not sure about the corncob though, but nontheless, I do like the character posters, I could see it as calendar images a bit.