Good thread. Sure flippinkittin, there is some "Bad" graffiti in this city, and some great stuff. Like sculptures, paintings, drawings, photographs, etc., its up to you to decide whether you like it or not. In my opinion you will find the best street art in this city in Chacarita. When I lived over there it seemed as if there were huge murals going up left and right each week. Near Jorge Newbury, there is an electrical plant and a park where every wall is covered. As I am leaving in 10 days, I am probably going to return there this week, and if you want I can post the address. As well, on calle Castillo, close to the train tracks (also in Chacarita), there is a bus terminal, the last stop for a few collectivos, where there is a lot of good graffiti. Lastly, as pointed out by BAJoe, around the hospital de ninos there is a lot of stuff. Unfortunately in this area you have people coming around sabatoging some really nice work by tagging up all over it.
Here is graffiti photos of mine from these 3 locations: http://www.flickr.com/photos/evanbrowning/sets/72157607017496569/
Here is graffiti photos of mine from these 3 locations: http://www.flickr.com/photos/evanbrowning/sets/72157607017496569/