I didn't down vote those or other languages I haven't really used. But you honestly can't think of any feature of those languages that might turn people off? ((((((((((((((((((((((((((((((((((((? any)))))))))))))))))))))))))))))))
To be really honest, a Lisp programmer doesn't really see that many parens in his code. And clojure doesn't even have those many parens. Maybe its just me, but I have only seen those who haven't used Lisp complain about too many parenthesis.
It was easy to dismiss Clojure for Scala and Haskell when I was first exploring functional programming.
Clojure was alien. When extrapolating what it might be like to work with Clojure, prefix notation (+ 1 2) was an obvious downgrade to infix notation 1 + 2 in a REPL. Arrow-keying your way around s-expressions on http://tryclj.com/ just seemed to confirm it.
But it's sort of like Vim: if you could see your Clojure workflow in a month, you'd be sold now. But since you can't, and since you don't know about Paredit, and since you don't realize that you probably will never even use a REPL since you'll be evaluating code in your actual source files, it's hard to be convinced and that's just how it is.
And there's still the risk of a month going by, just like in Vim, where you never even arrive at that killer could-be workflow because you never happened to stumble upon it and you don't even know it exists.
As I mentioned, but you still downvoted me, I didn't downvote lisp. I have used lisp - required to use it in a course. And I do recall seeing that many parentheses in lisp programs. I recall seeing that many parentheses (and curly braces) in C, C#, Java, Javascript, Perl, Scala, groovy, PHP, and other programs, too. Let's not pretend they don't exist though.
I do not downvote people people for expressing their opinions. Also I doubt if I have enough karma to do that. Someone else did. :)
What I meant was, Lisp programmers usually learn to ignore the parens. When I look at a Lisp code, I just see indentation and code. Your eyes train themselves to do that. Also I have never found excessive parens to be an issue at all. But like I said, maybe thats just me.