Pretty much anything to do with pop culture: books, gaming, movies, action figures, music. And by books, I mean literature going back thousands of years. Oral traditions were our pop culture, then we started writing down our myths and legends in books, then we made plays and operas, then we went to the movies, then comic books, now we do all that (well the movies are mostly at home for the time being) plus we game too. It's all just one and the same to me.
I have three bookshelves in this room alone stuffed to the brim, one of them mostly with action figures. More bookshelves all throughout the house, and I'll continue until my wife stops talking about the knife and actually holds it to my throat. My current avatar is taken from an illustration within Easton Press' new edition of The Argonautica, a 2250 year old epic written by Apollonius of Rhodes. My favorite bookshelf is guarded by a Darth Revan at one end, and Jedi Knight Revan at the other end.
I have put similar energy and time into my movie and music collections, but they take up a lot less space, and this year has been more about books for me.
I like to go out in the nature and spent some nights in the wilderness with a few friends of mine. Usually, we pick a random location on a mountain and spent our nights in hammocks.
When I was younger, my friends and I would go camping for a night at a time without anything except for liquid nourishment. No fire, no sleeping bags, no tents, no hammocks. By a river near us, too, meaning plenty of bugs and other visitors. I would not recommend this. But the liquid nourishment made it alright. I have to say, the spot you picked is a bit more scenic.