Here are two pictures of posters in the gunman's apartment. Nobody can say with any certainty yet whether they are at all meaningful as to the shooter's interests or character:
This poster seems to have been designed by this company, which also has zombie posters of Reagan, etc. You can buy it several places online, and I'm sure could find it for sale in stores somewhere.
Below the zombie it says "BRAINS," as you can see at the link above.
I don't know what this poster was about for the shooter. It could be anti-Obama or only casually so. However, if the owner wasn't politically informed, it's also possible to see it from a totally apolitical standpoint - ie for someone who's into zombies - so I won't claim to know what the gunman liked about the poster. It's also possible he just liked that it said "BRAINS," he being a neuroscience student. It could be a combination of reasons.
The gunman evidently listed his political outlook as middle of the road in an online sex website. I will note that two people in his neighborhood have claimed that they had racial outbursts directed towards them from the gunman.
Here's the poster in full:
Soldiers of Misfortune is a series of videos made by DERDER Productions about paintpall competitions. The terminology they use and the general vibe is in my opinion unsettling. But that's just me. I have the right to find it unsettling. However, I'm sure there are plenty of decent people into this stuff.
Video below: