My style preferences are for natural language - I'll lean toward whatever sounds like English. "Print if -d"/"Print, if the directory exists" is a pretty simple English sentence.

Others I know prefer a more mathematical approach, such as I would classify the latter.

In order to save time, and with little fear of others having trouble reading my code in my current environment, I may choose a syntax based on the fewest # of characters that do not give me pause.

There are a lot of considerations that can go into style decsions...not all may be obvious.

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