[ryangittins]

I suspect it's part of an effort to push back against the overwhelming number of thoughtless "listicles" which seem to dominate the internet. I'm planning a trip abroad right now and half the effort is in finding a list of places to visit which was put together by someone who actually went there and has some thoughts rather than someone who slapped together some nonsense. Or someone who has taken the time to really whittle a list down to 7 items rather than making another useless "1200 Things to Do in Italy Mega Post!!!"

I think you're right in that "opinionated" seems like a shorthand for "thoughtful curation" which is the opposite of what search engines tend to turn up.