I only get to train with my Sensei maybe 3-4 times a year, and sometimes six months or more go by before I see him. I stay in contact through the phone and Skype and such. But it seems like almost everytime I go to train, there's all new students, some techniques have changed slightly, and class structure has been revamped. Makes me feel like I'm going from a black to a white belt real fast. But it makes me feel humble, and reminds me that I'm as much (if not more) of a student than I am a teacher. Humility is a wonderful thing!