What Did You Enjoy?
When you’re getting ready for your viva there’s both time and a need to explore what was a challenge. Anything that challenged you has some value. You can explore what made it difficult and what you achieved by rising to the challenge.
If you faced problems then it makes sense to consider them again before your viva. You might need to talk about them with your examiners. It then makes sense to write summaries, rehearse and figure out how you explain why something was a problem and what you did about it.
Then there’s your research contribution. What makes it significant? How does it make a difference to your field or disciplines?
All of the above are worth exploring as you prepare for your viva but perhaps begin with something simpler. What did you enjoy during your PhD? What did you look forward to doing or come to appreciate?
When you’re getting ready for your viva a good starting point might be to think about what you enjoyed doing your research. There’s plenty of time for harder topics. What did you enjoy?