I started to do Go-Kan-Ryu, but found the lessons were undisciplined and sloppy, with there being many unruly kids there who made a mockery of the whole art with constant folling around and chatting - I switched to Wado-Ryo, which I believe is the traditional form of Karate, and I find it much better - the kids there are well-behaved (they get press-ups if they're not!), and the sensei really pushes you to the max, which i think is what it's all about.