I don't mind the C syntax where you can choose between curly or not-curly. However, if I see an 'else', then for me, both sides need to agree. Both with braces, or both without.

// YES                // YES               // NO
if (cond)             if (cond) {          if (cond) {
  task();               task();               task();
else                  } else {             } else
  alternate();          alternate();          alternate();
                      }
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I love Perl's statement modifiers. I'm often going back to a C or C++ project and finding myself typing something like:

double calc_stuff(double x)
{
    return 0 if x < 0;
    ...
}
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I also like using parens around first-class conditionals when required in Perl, but dropping them for modifiers which don't need them.

if (condition) { task() }
task() if condition;
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