In William Gibson's novel Neuromancer, we come to learn that the final heist at Villa Straylight, and the events leading up to it, have largely been orchestrated by the artificial intelligence Wintermute. And we learn that Wintermute's ultimate goal has been to merge with another AI called Neuromancer. It needs the humans' help to do it.
However, when Case finally comes face-to-face with Neuromancer, it's under duress. Neuromancer briefly traps Case in a virtual environment, in the hopes that Case will decide not to go through with the job. After he escapes, Case comes to suspect that Neuromancer had previously arranged several other incidents to foil Wintermute's plan.
What I don't understand is why Neuromancer didn't want to merge with Wintermute. The new entity formed by their merging is described, near the end of the book, as being unimaginably powerful, having subsumed the entire "Matrix". And Neuromancer's avatar, the young boy with Riviera's eyes, is spotted by Case some time later, so his essence wasn't completely obliterated by the process.
Why would Neuromancer not want this?
(Afterthought: It seems fairly clear why Wintermute wants to merge: Neuromancer is Wintermute's "missing piece," the other lobe, the "personality" that will elevate Wintermute's powers to God-like proportions.)