Murderbot interacting with different types of bots, constructs, and programs is really cool to read about. The idea of Murderbot being a voice in Mickey's head under the name Consultant Ren and navigating/learning through Mickey's eyes was unique and well executed, especially with the added twist of Mickey privately messaging Abene to hold up their lie when Murderbot has to reveal itself to save them. Mickey is such a sweet, trusting, and overall lovely creature and it's relationship with Abene prompting Murderbot to have some feelings/introspection about why it's having those feelings is a really cool (and dare I say human) touch, especially for a narrator who is pointedly and adamantly not a person.
I really enjoy that these are monster-of-the-week style books while still having an overarching plot.