Just some thoughts:

Being bored with something generally happens to me when I've experienced it very much all on my own and maybe even mastered it. However these things become fun again once other people are involved, positively or negatively. Positive people offer insight and help one grow, while negative people challenge beliefs and ability.

If anybody were to become bored of such things like lucid dreaming, yet still really love it deep down, then I would say take it to the next level. And there's always a next level; sometimes that next level just might seem outlandish or crazy. Write a book about it, go on national television and talk about your beliefs about lding, actually learn how to share dreams with other lucid dreamers, open a lucid dreaming school, learn to lucid dream while awake, etc... do the impossible, do the things that haven't even been discussed on sites like DV before. Get better at lucid dreaming than even a shaolin monk would ever be. : P The frustration felt when these things are actually *gasp* difficult, will probably ignite one's passion, If they truly still love what they do.

And it may very well be possible that one doesn't love what they do (LDing) anymore. That is perfectly acceptable in my humble opinion, just as long as a person does have something they are absolutely driven to accomplish in life at all times.