I feel the need for a personal AI is real. I mean at this stage of my life I feel replacing humans around/close to me with a strong AI.
The idea is kinda creation of a strong AI but control its learning ability limited to one user.
Pros:
You have someone who understands you completely.
Knows what/how to talk no matter How's your mood.
Could be used to calm down the user even in critical situations.

Besides, if something doesn't workout just fucking tweak the code its yours no matter what the fuck you do with it.
Do I make sense??