Tags, grafiti and streetart. While street art is more often liked and loved, the two first are still misunderstood or disliked.
Personnaly I didnt see any greatness in tags before I went to guided tour in Belleville, Paris. What I learned was that many great artist started with tags, moved into grafiti and streetart after times of working their technincs and their signature. The signature is said to be important in the street art underground world. You need to fine your own signature and your own way of doing it. Here is some of my latest findings in Sandes, Norway and in Bangkok, Thailand: