I've found that, in my social groups, "Liked" gets used as an acknowledgement for anything that doesn't require further discussion. Seems to clear up group chats of endless OKs back and forth, so I'm all for it.

Yup, exactly. I think that by itself makes it my most used reaction by an order of magnitude.

That, "ha ha", and "?" are probably about tied for my most used. I find that they are all useful ways to acknowledge or question something without cluttering chats.