The answer is never. Every day and every minute you are changing in some sort of way. Like this cartoon version of me. Every day it changed. And can change more if I keep working on it, To make the decision to say it is done. Is like looking in the mirror and saying I am perfect just the way I am. And if you really look at each photo the first one in sketch is really the only one that comes close to looking like the real me. showing some of the lines of age. The more I work on it the more I make it look less like me. And more like a cartoon version.
Have a wonderful day and remember to laugh and play.