Bruce Lee was cool. I've met a few of the big martial art's star Chuck Norris (really nice guy!) among a some other less known but on top o fthere game in terms of fighting (full contact) they all said that that bruce was genuine and a fearsome fighter with a incredible speed and power that they never seen before. He was a real Master for sure.
I don't mean to insult or disparage Kung Fu, it has its place and merits. If you want to 'seek paths to higher enlightenment' according to Eastern philosophies, Kung Fu offers much in that way. It is demanding and exacting. It is steeped in mind-body discipline, achieving harmony in your thoughts, meditation, concentration, focus, etc. again a lot of spiritual stuff. It is also very atheletic and physical, which can be a great work-out to improve strength, stamina, flexibility, agility, coordination, quickness, etc.
But if you're looking for combative skills, and don't much care for all the mysticism and spiritualism, there are far more effective and useable arts on which to spend a few thousand hours of your time. The artistic and spiritual elements of Kung Fu are what Bruce Lee became discouraged with. They needlessly multiplied the length of time spent mastering a lot of things that are meant to enhance your 'life philosophy', to make you a better and more enlightened human being, not a better fighter.
How many UFC Champions or even runner-ups have primarily been Kung Fu practitioners? Pride? NHB? Very few, if any. I've seen a few get their asses handed to them, though.
Chinese culture is steeped in 'paths to enlightenment' and 'spiritualism'. Martial arts isn't just something they practice for self-defense, its a religion over there. Its more than a religion. This is a culture thats eats gall bladders and all kinds of other weird things believing in their 'healing powers'. Most Americans don't understand the cultural significance of martial arts over there.
Kung Fu is among those martial arts which are far more "arts" than they are "martial". It has its own mythology and mysticism. Look at Ninjitsu, its all fantasy and legend. Sure, there were Ninjas, no they weren't invisible, nor were they invincible, nor could they fly. They were nothing more than covert operatives, body guards, and assassins, thus all the legend and mythology.
Look at the 'fantasy' Kung Fu depicted in Crouching Tiger Hidden Dragon. That is the significance of Kung Fu in their culture - artistic and spiritual. Its difficult to separate the 'fighting' elements of Kung Fu from the artistic and spiritual elements because Kung Fu has evolved to blend all these elements for over a thousand years. They have Kung Fu masters who think they're 'channeling' their spiritual energy to prevent injury while walking over hot coals or broken glass, when just building thick callouses on the bottom of your feet accomplishes the same thing. It took them 20 years of very difficult and rigorous study to learn that thick callouses protect your feet. Wow.