As for my room, I have to say that my set-up is different than anything I have done before and I actually put a little effort into decorating my walls, which are a suffocating white. I have four posters, all relating to media so I thought I would quickly list them.
#1. Doctor Who TARDIS Explosion: I am a big fan of time travel media, so Doctor Who is right up my alley. I started watching it in 9th grade, with Matt Smith as my first Doctor (though I promptly made sure to watch all the preceding seasons of the reboot). While I started watching primarily because a girl I had a crush on loved Doctor Who, I quickly became a big fan myself. The poster is a adaptation of the portrait done by Van Gogh in the episode "Vincent and the Doctor."
#2. & #3. All the Marvel Characters & Justice League Silhouettes: I thought I would list these together because I want to be clear that I give both comic groups buckets of appreciation. While it is hard to disagree that Marvel has movie superiority, the characters in all the comic universes are amazing. This is part of the reason I have so much trouble picking a favorite superhero or villain; the powers and personalities have been give so much life over the many, many years that their respective comics have been written.
#4. "Crime and Punishment" Litograph: This is a bit hard to explain, but basically what the team at Litographs does is take the text from a book and print it onto a poster in some shape that also represents the books content. For example here is mine:
As you can see I have enough appreciation for books, television, movies, and comics that I wanted to display them for anyone who might see.