Absolutely the same complaint. I wanted to see if it could summarize papers well, but I just could not handle all the conversation and attempts to make it 'exciting'. Especially in areas where I already know the background.

Over seven years ago, this has been foretold exactly by the show Silicon Valley:

https://www.youtube.com/watch?v=K3pYZwol6Dc&t=73s

Transcript of the fridge scene:

    Fridge (after a bar code was scanned): "Ah, there we go."
    Gilfoyle: "It's bad enough that it has to talk. Does it need fake vocal ticks like 'uh'." 
    Dinesh: "Well it just makes it sound more human."
    Gilfoyle: "Humans are shit. This thing is addressing problems that don't exist. It's solutionism at its worst. We are dumbing down machines that are inherently superior."

I would like to have a Gilfyole mode for NotebookLM where the machine answers only with cold precision instead of endless "Mmmhmm", "Yeah!", "Amazing!", "That's so cool!".

It's one of those things that's impressive initially, but after generating a couple it feels quite formulaic.

I really is an obnoxious level of over-enthusiasm.

Give German a try - trust me, you don't have to speak the language but anyone can tell that it's quite different in tone. No valley girls in Deutschland!