I liked that the Callista romance went nowhere. The Akanah thing was a total waste of time. The Black Fleet trilogy was garbage.
Though I actually like 2 of the 3 Callista trilogy novels.
I used to be a Luke/Callista shipper. But that’s because I was a hormonal teenager when I read Children of the Jedi, which was the first SW story I consumed in any medium which depicted Luke as a person capable of experiencing romantic/sexual feelings more intense than chaste puppy love. When I got around to reading the entire Callista Trilogy in my twenties, my investment in their relationship cooled significantly. And once I read the Hand of Thrawn Duology, I was fully aboard the Luke/Mara train.
My memories of the Black Fleet Crisis Trilogy aren’t sharp. I remember thinking it would’ve better if the B-plot with Lando had tied into the A-plot somehow instead of just being a diversionary side story.