you have it all wrong, all fighting styles will get you killed in the real world, see in a place like NYC, pick any fri or sat night and hang out in the emergency room between 11-5AM, you will see many so called MMA and Karate guys on stretchers, knife wounds, gun shots etc.
Yes I think practicing any sort of fighting is cool, but when it gets to your head you are doomed as people have little tolerance in these days and knives and guns seems to be used more and more.
Best bet in life is if you can avoid a situation just avoid it, if you can walk away walk away, all the people busy with who is and isnt respecting them end up cripples or dead at a young age.
Fuck your ego, when you are being pushed around in a wheelchair and need help wiping your own ass, try telling everyone the story of how the guy didnt respect you enough.