Soooo... I get to paint anything I want on my wall.

[The Blue Mongoose]

Gen 1 Optimus Prime and Megatron locked in epic combat.

Failing that...

A GIENT PEENUS HURR HURR HURR.

This man is a genius.

 

[Blood Masque]

I'd suggest something like this.
http://www.thinkgeek.com/homeoffice/stickers/a6d0/
or perhaps http://www.thinkgeek.com/geektoys/cubegoodies/6425/

You could either have it painted or order the wall graphics themselves.

 

[Neonbob]

My avatar.
You will never sleep again.

Or you'd sleep awesomely.
It's gotta be worth a shot.

an exploding whale

Fixed that for ye

 

[S.R.S.]

A Heartagram. I got one.

 

[Soxafloppin]

A mario level? Its been done.

 

[Dusty Donuts]

You need to paint a dirty brick wall and put graffiti and trash and piss stains all over it.

You should totally paint an Aperture Science Portal on it with one of the Test Chambers in it.

That would be aweshum.

I'd go with this. It sounds awesome, and the enrichment center rooms shouldn't be that hard to draw.

That can be part of the graffiti

 

[Sion_Barzahd]

I'd second the idea of doing the aperture science portal. Though somewhere you gotta have the
the cake is a lie
the cake is a lie
the cake is a lie
the cake is a lie
the cake is a ---

graffiti scrawled somewhere.

 

[Twilight_guy]

I suggest a solid coat of a neutral or calm color such as beige or blue. Anything you paint will look stupid to you in six months anyways. Trust me.

 

[teisjm]

Spoiler: this pic

This pic, only they're passing a joint

Or you could copy some of the graffiti writing from L4D

 

[Rhade]

Tetris, with the "always waiting for a line piece that never spawns" setup on the field.

 

[ace_of_something]

This, as life like as possible.

 

[Ambi]

Paint it back and draw on it with chalk.

 

[Aethren]

 

[siffty]

make paint bombs and go nuts

 

[Gobolo]

I've always wanted to just throw a bucket of paint on my wall. Seems like fun y'know?

Paint anything that comes to mind. make it a archive to how old you were when you were painted it and what was happening in your life.

combine these two ideas together - throw paint on the wall as an archive of how you were feeling at the time, say you get home and you had a horrible day, throw some paint in the wall in a colour resembeling it as an archive of that moment, but I wouldn't get too conviluted coz otherwise you would have a random coloured ugly wall, when its begging to look as if throwing a couple more buckets will make it too crowded whitewash the wall again if you want or leave it.

 

[TimeLord]

make paint bombs and go nuts

Great idea if you want to ruin the rest of said room

 

[siffty]

make paint bombs and go nuts

Great idea if you want to ruin the rest of said room

cover the rest of the room in plastic or something?