How many days would you repeat before going completely doolally? Nah, I'll settle for one good day.
Repeating would get boring
That doesn't sound fun at all
I don't want to repeat the same day forever, even if it was the best day of my life....after a few times in repeating it, it would lose its "specialness" I'd keep that "specialness" close to my heart and go for one more day.