I have to admit that after 30 years of seeing Basic and Cobol programs structured

if  (cond)
  do something
else
  do something else
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It may be prejudice that makes me prefer this structure. But I do think there is good reason too.

George_Sherston's comment about the relative importance of the things_to_do is a good one and I take this into account by making free use of unless() {}, but there's another issue here, for which I will put on my tester's hat. It is important that we see clearly that it is a condition. From the perspective of a test designer, the presence of a condition is more important that what it does. And since I think better code gets written if everyone who comes into contact with it thinks about it from a tester's perspective, that makes "C" style a clear winner for me.

BTW SInce I was using the "C" style a long time before C was invented, I find it hard to accept the phrase "traditional C style"!!