Emir, you're a little late to the party. Nelson, Compella and a bunch of others of us have started and participated in numerous threads.
Strictly speaking, JKD isn't a "style" although some practitioners try to make it so by saying they're "original school", "Chinatown School", "Kali Academy school", etc. It's about the individual and finding what works for you. Having said that, Si Jo Lee believed there were certain fundamentals you absolutely needed to master: footwork, defense, combination striking, speed, power, grappling, striking and above all CONDITIONING. That's what really loses or wins a fight. Si Jo understood that not only did you need "cardio", but your body needed to be able to withstand the rigors of combat. In other words, you couldn't be soft and had to be able to handle some punishment. He understood you would get hit at some point and how you handle that is important. Also, conditionig of the mind and spirit to persevere.
I agree with Compella that Jones is a good example, but GSP is the best so far. His JKD is awesome in his example.