I do Moo Do Kwon, Chung Do Kwon, basically soft style (Moo) and hard style (Chung) of TKD. I've never been to Korea, but I studied with Soo Kon Kim for a day. There was a seminar at my school, and he came and studied for a few hours... It was pretty fun. For info, if no one knew, the soft styles are more kicks like tornado kicks and multiple kicks as well as flying kicks, and Hard style is basically "hard", usually one kick, most of the time advancing, step in front, or crossing kicks. More punches and and solid stances than Moo Do Kwon. I like the mix, it is interesting.