What is Lisp good for?

When I hear Bash/Perl/Ruby/Java/C/ML/Erlang/Smalltalk/etc I know what I'm dealing with, I know what they are good for and when to use them, but what about List? Don't get me wrong, I like Lisp, I just don't see for what I could use it.

So, what are you doing with Lisp and why exactly Lisp over any other PL?

Lisp is also excellent for abstraction and good at eradicating code duplication

(Really simple example)

Let's say I have a function print-customer-info that takes a list containing customer information and prints it out nicely.

(define (print-customer-info customer-info)
  (let ((name (car customer-info))
        (age (cadr customer-info))
        (street (caddr customer-info))
        (sex (cadddr customer-info)))
    (display (string-append "Name: " name "\n"
                            "Age: " (number->string age) "\n"
                            "Street: " street "\n"
                            "Sex: " sex "\n"))))

And I call it like this:

(print-customer-info '("Dave" 23 "12 Elm Street" "male"))

And it prints out:
Name: Dave
Age: 23
Street: 12 Elm Street
Sex: male

But this stuff is annoying:


  ...
  (let ((name (car customer-info))
        (age (cadr customer-info))
        (street (caddr customer-info))
        (sex (cadddr customer-info)))
   ...

In a general sense, what I am doing is mapping the values of a list to some variables. But I really don't want to manually type out that for every single variable, do I?

So I can write a macro let-from-list that does this for me, so the code then looks more like this:

(define (print-customer-info customer-info)
  (let-from-list (customer-info) (name age street sex)
     (display (string-append "Name: " name "\n"
                             "Age: " (number->string age) "\n"
                             "Street: " street "\n"
                             "Sex: " sex "\n"))))

Which is a lot nicer. Of course, there's already a simple way to do this in Scheme. But the point is, if it wasn't built-in, I could add it myself.