Biggest tell that a comment is AI: it's deeply uninteresting.

No one wants to read your ChatGPT outputs.

Not sure if serious but I don't think that's precisely it. To me, it's more that it rehashes a point until it's fully beaten to death, putting obvious aspects in a list, being subtly wrong, writing a conclusion paragraph to the previous three sentences... it's boring but not because of what it writes but, instead, how it writes it. Of course, it can also be inherently uninteresting but then you should have entered a prompt that causes the autocomplete function to ramble about something you're interested in :P

It also feels way too sanitised, like it went through some companies PR department (granted, that's because it went through openais pr department, but still)

> No one wants to read your ChatGPT outputs.

...except ChatGPT fans.