If you had the chance to have the best year of your life, complete with more money than you know what to do with, perfect relationships with family, friends, and spouses, fun things to do every day, no job to go to (unless you love your job), and just everything would go right every day, BUT after the end of the year, you wouldn't remember any of it and your life would go back to exactly how it was before the year started (and no, you wouldn't be able to carry over any of the money or things you bought into the next year), would you do it?
No. What makes me, me, is my memories and experiences that I have and share with others. If I couldn't remember them, I would lose a part of myself. And I would have nothing good to remember when times are tough.