Most practical martial art?

By practical do you mean studying martial arts for defensive measures to ward off the neighbourhood thugs that chase you around, kind of practical? Because if so I'm at a loss as to how something like Judo, and well everything else mentioned, can be called a practical art. You're not going to want to roll around on the grass with some dude trying to shank you. If you're going to study anything I would simply suggest some form of chinese boxing. No flips. No upside down spinning heel kicks. No rolling in the mud. Just something with a heavy emphasis on striking with the fist, palm, or elbow.

How ya doing, buddy?