All the things you didn’t do. All the things you couldn’t do. All the ideas you didn’t follow. All the questions you couldn’t answer. All the opportunities you had to turn down.
You have to let them go when you prepare for the viva.
Whatever they mean, and whatever you might do with them in the future. They might be of interest in some way, or add context to something you could need to talk about. Exploring them might be a small part of your preparations but they can’t be your focus for getting ready.
Focus on what you did. Focus on the ideas you explored. Focus on the questions you answered, the results and conclusions you found. Focus on the opportunities that lead you somewhere.
Focus on who you are, not who you might have been.