Not a dislike, but when I read the Dragaera book Orca and found out that Sethra and Kiera are the same person, I had to go back and see where this was hinted at in earlier books. Then, I noticed in Taltos how at a point where Vlad is unwilling to climb Dzur mountain to meet with Sethra, Kiera shows up out of nowhere and gives him a peptalk. Also interesting is her promise that if Morrolan kills Vlad, he will be dead in less than a year. Sounds a lot different when you realize that the speaker is an insanely powerful sorceress.
That revelation also makes Kiera's observation that whomever the man she's investigating in Orca might be, he isn't Sethra Lavode a Moment Of Funny.
Orca also has one that is less a dislike than a realization of the author's cleverness. It's been remarked how in one scene in the book, Kiera notes in her narration about an odd expression on Vlad's face. It's been suggested (and I agree) that this was indicating that he and his familiar were telepathically making snarky comments.
There are other hint moments in the early books about the Orca spoiler. Look at Loiosh's first comment upon meeting Sethra for the first time.
I didn't really care for Vlad's bullying of humans in Dzur nor the very bleak tone of Jhegaala. Then, it hit me how the latter shows his development in the books set chronologically later. In the earlier books in the series, Vlad talks a lot about how Dragaerans, even the ones he likes, are scum. Notably, after experiencing cruelty from fellow humans in Jhegaala, he generally stops making such comments and is more willing to judge them by the same standards as humans. This also explains his behavior towards humans in Dzur- for better or worse, Vlad now treats everyone equally.
Not to mention the title of Jhegaala. Unlike all the other Taltos books, not a single member of the titular house is anywhere to be seen. But that's because as the series has gone on, the titles have begun to be more and more about Vlad and less and less about the circumstances and people around him. And so the book about an animal Dragaerans treat as a symbol of metamorphosis and change is the one where he's forced to reverse half his attitudes completely.
The observation that humans are a lot like Jhegaala, in that individuals have the capacity for a huge range of personality traits that evolve over time, almost makes everyone in the novel an honorary "Jhegaala", by Dragaerans' standards.
Fridge Brilliance: There's a minor digression in Phoenix in which Vlad notices that Rocza is acting a bit oddly, so asks Loiosh if she might be pregnant. This doesn't seem important, until you go back and re-read it after learning about Vlad Norathar, and take note of Loiosh's reply that Rocza is very close to the absent Cawti ... and you realize that she must've been pregnant by then.
In a very minor example of Fridge Brilliance, in Issola Vlad inspects the Morganti blade given to him by the Jenoine, and notes that it's somewhat blade-heavy for his preferences. What seems like yet another demonstration of Vlad's weapon-savvy may, in fact, have been Foreshadowing of how Spellbreaker will wrap itself around the dagger's hilt when it's transformed into Godslayer/Lady Teldra, thus adding to the grip's weight and balancing out the weapon nicely for him!
In The Paths of the Dead, Morrolan, Arra and Teldra fight some Eastern villagers who couldn't understand their language, and Teldra ponders how it might not have been necessary if only they could have spoken to each other. Hundreds of years later in Issola, Teldra uses her ability to speak Jenoine to prevent a fight from breaking out. Had she been studying languages ever since PotD, in hope of averting needless bloodshed?
Fridge Brilliance: Jhereg's colors are grey and black. For Dragaerans, grey is the color of death while black is the color of sorcery. Now, what are the two major branches of House Jhereg and what are they most infamous for trading in?
It's also a snarky reference to how House Jhereg's original founder was an outcast from the House of the Dragon. Dragons wear black and silver, and what color does silver become when it loses its fancy noble-metal sheen? Grey.
Aibynn's use of drumming to open up a pathway to Verra's realm at the end of Phoenix seems like a complete Deus ex Machina at first, given there's no other hint that he's got any magical or psychic talents. But when you consider the nature of the Dragaeran afterlife, and the fact that Aibynn is a ritual ("surfy") drummer by preference, it makes sense: pure-blooded House members find their way through the Paths of the Dead using information from books unique to their individual House, but the natives of Elde and Greenaere have no Houses. As cross-breeds, they can't navigate the Paths the way House members do, so their culture found an alternative method of getting to the Halls of Judgement, using mystical drumming rites (possibly necromantic?) to open the way for the deceased.
Looking at Issola and Taltos, I realized that Loraan had both Spellbreaker and a human (you know what I mean) soul. And as a high-level wizard, he undoubtedly had access to powerful Morganti weapons. Now how is Godslayer made?