I personally really enjoyed Gabriel Orozco's work, because he experimented and he played with materials. He observed his environment and that influenced his work. Orzoco let the world influence him, and created really interesting pieces, such as the Ping Pong Pond table. Orzoco experiments in every material and what he produces is amazing.
I also liked that he didn't have a studio. He said that the studio becomes a solitude-like place and then that's where you forget the world. I also agree, but I do have to admit-- it's wonderful to have your own space where you could do whatever you want!