One thing that's been bothering me for some time is how it is to be the Nazgul. I know they're the slaves of the One Ring, but how much of their past identities are left in them? And do they have any leftovers of the free will they once had?
For example the Witch - King. As a Nazgul he was the king of Angmar, and that required a lot of management with logistics, economy, commanding an army and stuff like that. Many important decisions he had to make in order to have a country function properly. I wonder whether it worked like a scripted computer program (like AI in BFME ), so that he could do only what a programmer (Sauron) coded in him to function, or maybe he had some sort of authonomy and worked according to his own mind, as long as it did not contradict the will of his master. Same questions applies to hunting Frodo, attack on Gondor etc.
I personally often imagine the minds of the Nazgul somewhat similar to that of Gollum, but much more enslaved to the Ring (through the Nine Rings). So they're still autonomous and have some leftovers of their past identities inside (though probably even less than Gollum has), but are unable to act against Sauron, even if they don't like him (similar to how Gollum couldn't allow Frodo to destroy his Precious, even though a part of him knew it's a good idea). The difference is that Gollum is in no way loyal to Sauron (but he is to his Ring) while the Nazgul are the most faithful servants of the Dark Lord, but I think it has something to do with the way the Nine Rings are supposed to work (they were made to enslave, while the One was made to rule).
But this is just my personal opinion, not canonical in any way. That's why I'm interested to know what do you think of this. Maybe someone knows more on the matter or has also some interesting opinions? Other than that, I wish you all good day and a happy new year!