I always wondered why Dumbledore never had his crooked nose fixed (by magic).
Spoiler:
After reading this book, I think that he purposefully kept it crooked as a reminder of the truth his brother had been trying to tell him about himself in those early years. Just a reminder that his internal draw towards power led to the death of his sister.
or to keep his glass from falling off.. jk.. i agree that he must have kept it as a reminder, just like harry kept the locket as a reminder of what it had cost him to obtain it _________________ Shoot for the stars and if you miss you will still be among them...suffocating.