Memory loss to head injury, what would you hope not to forget?

If you suffered a head injury where your memory from the injury on was almost photogenic but the memory before the injury was reduced by 40% what part, events, people, etc, of the before memory you would hope not to forget? And what people, events, etc, would you be upset about if you discovered you had forgotten them if it would even mean anything to you because you’d have no memory of it?