> Do I prefer low-effort, off-the-top-of-my-head reactions, as long as it is human? Or do I want an insightful, well-thought-out response, even if it is LLM-enhanced?

For me it's the first one every time. If only because LLM don't learn from responses to it (much less so when the response is to a paste of their output). It's just not communication. From that perspective, the quality of even the most brilliant LLM output is zero, because it's (whatever high value) multiplied by zero.

Even a real person saying something really horrible and too dense to learn from any response at least gives me a signal about what humans exist. An LLM doesn't tell me anything, and if wanted the reply of an LLM, I would simply feed my own posts into an LLM. A human doing that "for me" is very creepy and, to my sensibilities, boundary violating. Okay, that may be too strong a word, but it feels gross in a way I can't quite put my finger on, but reject wholeheartedly.