It depends what you call perfect.
I was on holiday recently, I was snap happy, and took a lot of shots (in my defence, I was using 3 shot auto-bracketing a lot of time, as I want to try out some HDR, and the people I was with, don't appreciate waiting for someone to take photographs).
Out of all of my shots on that holiday, so far I have found one which I am happy to get blown up to 20" size to hang on the wall. This shot was taken on a day when we were at a sanctuary type place, and so could take more time to compose and think about the shots. This one had basically no PP applied (basically a crop to fit).
It may not be perfect, but I am happy with the way it turned out. In a couple of years time, I might consider it a bad shot, perhaps as my skills increase, but at the moment, I am impressed with it. If I were to rank it against all the shots I have ever taken, it would be at the top end, if not the top. A perfect shot, is something which improves on what I have already been able to do.
I enter a local photography competition as part of the village show. The rules on that show is that digital photography is allowed, but no post-processing must be done (so in theory by cropping I am breaking that, but I justify it as I could in theory do it with a pair of scissors). So to me, I strive to get a photo that I am happy with, which is good enough (read perfect), without any post processing.
My interest is in wildlife, so my excuse is that you have to be in the right place at the right time, and be lucky, to get the perfect shot.