How many people have posters in your room? I actually didn't for a long time but over my University years there have been a lot of Poster sales that came to my campus and I have accumulated several.

I have:
A small Andy Warhol Poster (donated by a friend who didn't want it anymore)
A Kingdom Hearts 2 poster
A Goodfellas poster
A Back to the Future poster
An Old Coca-Cola wood mounted Poster I took from my bar I work at when they redecorated
A Dragonball Z poster (Saiyans and Piccolo only, standing all "tough guy"-like)
Final Fantasy XIII poster
Starcraft II poster (Kerrigan)
a small wood mounted Friends (the show) poster
A House poster on my door

I have a cloth FFVII poster of Cloud I havn't found a good place for. I also had a huge "Make way for the bad guys" poster featuring many famous gangster movie guys but it was so big it eventually ripped under its own weight so many times I had to scrap it.

I also have a few other things like a wall mounted Sword, My diplomas, a few pictures and drawings.

What do you have on your walls?