Since alot of my work goes into trying to hide my mistakes(I can't afford "test models", so whatever model I'm working on at current becomes a test-bed for all of my experiments and ideas...), I am actually always very proud of my accomplishments, as I am always thinking about how hard it was to repair the area where a hole formed from caustic vapors from whatever paint or adhesive or thinner I've just experimented with! Or, how to fix a panel line that was scribed over raised deatil, when the panel line has half of a make-shift scriber snapped off and embedded in it!
Nope, my models are always made with pride and accomplisment, and, maybe someday, I'll figure out everything, and not need to test on my models any more!!
As for perfection, Like I always say:
"There was only one perfect man, and look at what we did to him!"