When I first learned Lisp, I quickly got to the point where I "don't even see the parenthesis". Shortly after that I learned to love them, and see them (and Lisp's simple syntax as a great strength).
Now extraneous syntax, even in a half-Lisp like Clojure, seems ugly to me. It's a real pity more people don't appreciate the elegant simplicity of Lisp (and especially Scheme).
Not me, but I would guess it's because, while both Common Lisp (ie. SBCL) and Clojure are both Lisp-like languages per se, Clojure departs further from "pure" Lisp than Common Lisp, in that it replaces lists with things such as vectors in a lot of places (see defn syntax).
Now extraneous syntax, even in a half-Lisp like Clojure, seems ugly to me. It's a real pity more people don't appreciate the elegant simplicity of Lisp (and especially Scheme).