As someone who loves Lisps, I still have to disagree on the value of the s-expression syntax. I think that sexps are very beautiful, easy to parse, and easy to remember, but I think that overall they're less useful than Algol-like syntaxes (of which I consider most modern languages, including C++, to be in the family of), for one reason:

Visually-heterogeneous syntaxes, for all of their flaws, are easier to read because it's easier for the human brain to pattern-match on distinct features than indistinct ones.