It's not about liking it. If a specific move you have been taught, for you, routinely gets you kicked in the face, or anywhere undesirable, or plain doesn't work... why, according to JKD, should you keep it?
I have never, ever been taught such a move. Ever. Id call it common sense to remove the ineffective. That isnt the glorious pinnacle of JKD, thats being sensible.
Loooooot of moves I like. Heck, most in MA. But that doesn't mean I use them all for sparring, or even survival.
The only thing Ive ever learnt in MA which I wouldnt use, is Hammerfists. Because I prefer Downward Punches. Thats Me having a preference. Not adhering to the teachings of Bruce Lee and JKD. Maybe for You it is, but for Me, its like saying that because You learnt a Front Kick in Kung Fu, that Youve learnt a Front Kick in Kyokushin.
You don't have to, but if they work, than either way you are following a concept of JKD in keeping what works, for you.
If I keep everything, Im adhering to JKD. If I keep nothing, Im adhering to JKD. If I keep some things and not others, Im adhering to JKD.
http://en.wikipedia.org/wiki/Forer_effect
Its kinda like saying that if You avoid a fight, Youre a Confucianist Buddhist Pacifist. Tisnt the case. You made the choice. You. Not the belief system.