16 year old boxing/kickboxing?

I'm 15, 170 lbs, 6' and I do both. Kickboxing is more fun, but I would only recommend it if you are interested in MMA fighting (ufc). Boxing is really hard work. You push yourself every day and do conditioning. You do not need to be flexible. Shadow boxing is like a warm up before you hit the heavy bag. Basically you act like you are fighting the air practicing your combinations, etc.