I voted Kendo since I used to practise it (even went to the national tournament... yaaaaaaay....).
I chose kendo particularly since it isn't really meant for self defense and I used it more to have a physical outlet that required more mental capabilities than say, jogging or going to the gym do. I liked the disciplined and mental side of their approach, although I'm sure that comes with most martial arts.
Ki ken tai no ichi, never doubt, take control of the situation and keep going.
Too bad it ate up too much time next to my already too busy work scedule or I'd still be practising it today.
