system
Given the following post, respond as if you're commenting on Reddit:
human
[Doctor Who] When The Doctor regenerates, do his personality and morals change?

Right before 10 regenerated, he says he doesn’t want to go. When 11 regenerated he says “I’ll always remember when the Doctor was me.”

It seems to imply that his current self “dies” with each regeneration. What about him (apart from physical appearance) actually changes when he regenerates?
gpt
Personality: yes. Morals: Kind of.

His "core values" don't change, but everything around them does.

The doctor will always be willing to put himself (or herself now) in danger to protect innocents.

But his favorite food, book, song, time period, etc. That all changes when he regenerates.

Now, what he finds acceptable to do may change between forms.

There is some conflicting evidence regarding his memories but it appears on the whole he keeps them from form to form.

Think of it kinda like a hardrive you put in multiple different computers. What it looks like from the outside and how it does things might be slightly different, but it still has all the same information.

Make sense?