You can write beautiful programs using Lisp.|
You should enjoy the beauty of this language first, even it is practical as well.
Lisp is the second oldest programming language after Fortran, and it has many dialects. Common Lisp and Scheme are widely used dialects nowadays.
Common Lisp is more practical. It suits to write large scale programs quickly. Knowing Common Lisp is a great advantage for your business if you can choose language freely.
Scheme, on the other hand, is a compact and graceful language which crystallizes the essence of Lisp. It is mainly used for education and research works. The Structure and Interpretation of Computer Program which is one of the best textbook for computer science uses Scheme to show programs.