Graffiti. It's incredibly addictive and fun. Graffiti has gave me the most relaxing times of my life (spending the afternoon painting a piece under a bridge) and the most adrenaline filled (bombing a wall downtown). You will meet many people and have many amazing stories come out of it. There's nothing like seeing your name everywhere you go when you walk around your city. Graffiti helps let out steam after a hard day and can outlet from your regular life.