Re: Aikido wrist catching?
Keith was simply saying that stress is a greater danger to one than all the thugs on the street, and if you were that stressed by your life you would be wise to find a release instead of worrying about self defense.
Now that you've explained yourself more fully, my vote is for Aikido. My biased opinion is that it is easier on the body than judo in general. You CAN get hurt, or even killed doing Aikido, but it isn't very likely - riding a motorcycle on the street or commuting to work on a bicycle is probably more dangerous. Good luck and enjoy whichever choice you make.