I don't like this for the simple fact that it necessitates Robots with legitimate, player-level intelligence/decision making/independent thought. It's the Bethesda problem of Mr. Handy's being AI even though that is the role of the room-sized ZAX machines. Fallout Robots/droids shouldn't have much more intelligence than a really charming Siri.
Not really. It's possible to make it so they have a personality, but not real AI. Just look at robots like ED-E, the Sink personalities, Yes Man, etc.
Also it would allow to offer dialogue and quest options that are more cold, less empathetic, more machine and less "human".
Basically you would be playing as a more limited in the options, but you would have a learning protocol, where your personality would improve with experience.
Let me describe some basic scenarios:
The character is talking to someone about getting a quest.
(if character is human) I'm in need of some cash, so is there any work around here?
(if character is robot) My information library specifies that currency is needed to acquire repairs and upgrades. *BEEP* How can I obtain currency?
The character is asked to help settle a brahmin dispute. There's two characters that claim the brahmin belongs to them and not the other person:
(if character is human) After I heard all of what you both said, I can agree with *insert name of character here*.
(if character is robot) I computed all the information available, best course of action was calculated. *BEEP* Animal will be divided in two and distributed accordingly. *Shoots brahmin*
The character arrived at a new settlement. Guards tell the character to not cause problems and keep their weapons holstered at all times:
(if character is human) Sure thing.
(if character is robot) Does not compute. Cannot comply! (Guard reaching for his weapon) What the fuck does that mean? (robot character) Can't overwrite self-preservation protocols. If existence threatened, will have to use weapon for self-defense. (Guard) Does that mean you will go berserk and start shooting at people? (robot character) Only if in need to protect existence. Self-preservation protocols cannot be overwritten. (Guard) Uh... Ok, ok.... I guess you're good to go... But don't start shooting people...
Yeah, these examples aren't very good, I just woke up and my brain is still half-asleep. I don't think I managed to convey the true purpose of having a robot that doesn't have true AI being playable.
I guess one of the ways of explaining is that the game would be different, kinda like when you play Fallout with low INT. You would have less choices in some occasions and (rarely) have more choices in other cases. You would be locked out of content, but maybe have access to extra content.
It would be a harder, more limited, with less overall choices, but quite different way to play the game