I never understand these complaints about parenthesis, my editor takes care of them. Interestingly people never complain about the inconsequences in mathematical notation, i.e. infix operators like plus or minus (e.g. 3+5), postfix operators like faculty (i.e. 9!) and last but not least prefixed user defined funtions like f(x).

But as Lisp was my first real language, I might be a bit biased. And besides Lisp I like languages like Forth or Postscript, and even Perl ;-)