I wish they had more scenes together in Castle, but it was really nice having them share a screen again. But it's never enough now, not unless Nathan is playing Mal and Adam is playing Jayne. Only then I'd be completely happy.

Wow, that's such a fan thing to do. Definitely get the hat, not only is it super awesome because of Jayne, but it's also really cute! You could make it yourself too, I've seen a lot of instruction on how to make it online.