Well in New York, where I'm from, has some of the most creative graffiti art one could imagine! And it's essentially everywhere. Idk any specific artists though. There was the one guy who did "Obey," but he "Obeys" Obama!
There's not so much here, the only good one I know of is Banksy, but thanks anyway Man, I'd love to go to new York, hopefully one day haha
Belin: El Mac David Walker: Telmo Miel: The list goes on, there are some crazy sick motherfuckers out there. Google be your friend, and if you're on Cuntbook, search for a page called "The Real Art of Street Art".
Never got tagging, it's litter in my opinion. If you wanna get your name around do something like the above, or don't do it. But whatever..