should i start judo,taekwan do or karate ,which one is more useful and why?
Or should go to damn cycling lessons to lose weight?
Judo - Steven Seagull is a huge fan, I think that should tell you all you need to know.
Tae Kwon Do - depending on the lineage is probably more sport than martial art.
Karate - depending on what kind (Shotokan maybe), is probably the most traditional. Personally, this would be my choice. You'll get beat up and learn striking/blocking, etc. Probably some grappling moves, mostly standing techniques and disarms, but not BJJ ground n pound, so you don't have to worry bout gettin a boner because you grabbed some guys taint.