I think it's interesting how much people's aesthetic preferences differ on lisp syntax. Personally, I think the parentheses are visually appealing, but it's probably an acquired taste. Even more than that, I actually now find it much more difficult to parse infix notation for math, equality and so on (and not just operators in syntax-heavy languages like Haskell). Prefix notation, while requiring a different reading style, is incredibly clear and unambiguous as long as no one's gone macro-crazy on you.