I love graffiti, by which I mean marking a public space with the intent of conveying or challenging ideas, or just for the sheer decorative pleasure of it. But give me something witty, artistic, whimsical, interesting (aesthetically or conceptually) or just plain odd-- none of this tagging business or "call XXXXXXXXX for a good time".
I go around taking pictures of graffiti, too! I got off my butt and uploaded a whole bunch of graffiti photos I've taken (or ones that friends have found for me)- some from London, the rest of them from Perth- so if you're interested, do take a look around. ^^