Yeah, so you won't see any chatter if flying a solo ship.
I could implement a "talking to yourself" option if people really want it, but setting the right personality might be an issue.
I have idea about this solution:
We could select the specific traits that affects how our crew talks on our own ship. At character creation menu, you could add certain menu that allow you to pick any traits that you would like for your character to have. And If it is possible, ensure it is compatibility with SS+ and Nexerelin too.
And at the same time, you also could implement the crew reaction to any situations like allied ships does when taking damages. The type of chatters depends on the amount of rookie, veteran, and elite crew that included in your ship, just like allied ships (If I remember correctly if this feature is already implemented for allied ships. Please correct me if I am wrong though.)