I've interviewed a lot of people who have experience with Lisp, and I ask them if they think learning Lisp is worthwhile. Almost all of them reply with some variant of "Why on earth would you do that?" I've received a couple "Yes, definitely" replies from people who are hard-core Lisp hackers. So empirically it seems that most people who learn Lisp don't find it particularly rewarding.
I've talked to many fewer people than you, but my impression has been slightly different. Broadly speaking, the engineer-type programmers tend to dislike Lisp, and the computer-science-type programmers tend to like it. (Those two classes cover, in my [albeit limited] experience, two of the principle ways of thinking about programming.)
Eh. It's attitude, not job description :) And anyway, you should probably take that with a relatively enormous grain of salt, as small sample sizes aren't conducive to accurate data.
