KV refused to distract our attention from his brother. He knew that if he got up to address us that we would want him to keep talking, so he didn’t. He deliberately minimized his presence as much as possible. Nevertheless, the respect he had for his brother's expertise was palpable.
This was my only encounter with Kurt Vonnegut the person, and it made a powerfully positive impression on me.
I can't say if he was universally nice, but on that night he was nice, charming, and a pleasure to eat dinner with.
Not sure I buy that being depressed or even suicidal makes you not "nice" as a general concept.
I’m surprised people care that much or that it matters.
I love his books. Whoever wrote them wrote them well. The rest is his own business and that of his friends, business partners and family. Not mine certainly.