I do 2: Tai-Chi for breathing and balance, and kickboxing for cardio (I just do the training, no sparring). My advise is to do something local (close to home),

I do 2: Tai-Chi for breathing and balance, and kickboxing for cardio (I just do the training, no sparring). My advise is to do something local (close to home), that involves other people; there's more chance that you'll stick with it (IMHO).