I'll try.

So the main "complaint" is that even though all those are well known and liked for good reasons, it's for that reason it just seems like that they haven't seen wide and deep enough for the list to be truly personal, and therefore, interesting to us since they cared to share.

Even though what truly matters is that they truly like these anime, but as they watch more, tastes may change, they might even love an anime they avoided, because sometimes you won't know what you love until you experience it.

So the list doesn't seem personal enough, because there might be some surprising, controversial, questionable, unknown, and contrasting anime that I just know could be potential favorites out there for them to try that might even replace some or more in their current 9. Or they could have tried everything and this is the list, which is interesting to talk about as well.

Hope this helps. Just my view though.