I mention quoting styles specifically because when I asked folks what Rubocop rules they thought were particularly helpful... Mostly, the answer seems to be no particular rules, they just want things to be uniform.
The exception is rules about quoting strings, which got mentioned by far the most of any specific rules, but sometimes in specifically-trolling ways.
So apparently it's not that any specific rules are good, but if we could avoid variety in string quoting... Something good happens?