Re: Why do you like Krav Maga?
This follows with some of the given answers, but just my two cents as a Krav practitioner:
Practicality. No other system addresses the variety of threats that Krav Maga does.
Principles - instead of teaching you a thousand techniques, Krav instills principles. They create techniques that defend against the greatest variety of attacks, making it quick to learn.
Instinctive - no other system uses movements based on natural instinct the way that Krav does.
Each martial art is the best at what it is designed to do. If a practical fighting system that will defend threats on the street is what you are looking for, Krav is it.