I studied judo up to the age of 12, got a Brown Belt (which means I was as well trained as Chuck Norris
), but I had to make a choice between school and Judo. In order to progress to a Black Belt, I would've had to train 5 days a week. Two days was great fun, but more wasn't worth it then.
In hindsight it was a shame that they sorta pushed me to make that choice at that time, if I'd gone to train two days a week, slowly increasing at say 14/15 to 3/4 days, eventually doing 5-6 days at 17 would've been possible.
On the other hand, the style of Judo in competition hasn't appealed to me in ages, it's just too passive. Much of the beauty, balance, speed and control has been lost. The emphasis, not just in Judo, is on not losing.
Other more recent additions to the Martial Arts seem to focus more on Martial than on Art. It appears Jeet Kune Do also follows that pattern, but at least it will have some aggression in it. I think that should be the goal: Controlled Aggression. (both in mind and body, of yourself and your opponent)
Reading about JKD, it appears JDK eschews the parts of Judo I liked so much (the beauty of perfect motion, making mechanics work for you) and in stead introduces what I really don't like: all the quasi oriental philosphy stuff...
It also seems to follow a familiar pattern; there are competing factions of "true believers" who all claim to adhere to the founder's original purpose.