Hockey cards are no doubt my favorite. They remind me a lot of when I was a kid and seeing some of the artwork that people do on this site is really cool. I just wish media grading was quicker and a bit more consistent, but I understand that can be a bit challenging. Furthermore, other PTs that allow graphics that aren't too complex to make are fun because they allow more people to participate. With hockey cards, there was a shared template that people could use which helps a lot to produce decent quality stuff, but other PTs like graphics of your favorite player off ice can be difficult if you chose a player render of someone who is not popular or an NHL player.