I understand doing it for discipline/fun. I don't have any motivation to do it, but I have a small daily program of some basic moves. That program isn't making me a body builder, but it helps me to get up in the mornings and keeps me in shape onw when I don't do any of my martial arts anymore...
I would have serious difficulties in becoming a bodybuilder. I hardly gain mass at all, not muscular mass or fat. My metabolism is weird, doesn't allow me to gain weight.
I know it sounds stupid but I always wanted a body like Spider-Man/Nightwing.
Who wouldn't? They have a grea tbody after all...