Clojure is nice (I have been using it more often for customer work). For me, Clojure still lacks the totally immersive feeling of using (as examples) Gambit-C with Marc Feeley's Emacs support (unbelievably sweet error handling/debugger) or Common Lisp with Slime. Clojure with swank-clojure is nice, but is still running in second place.

All that said, given a free choice, I use Ruby for most tasks.