I realize that for some people a perfect flight is one where you and your plane are safely on the ground and haven't busted any regulations, and other people nit-pick every detail. I got my PPL in the mid-1990s, stopped flying for about 20 years, and just started to get back into it this year. I grade myself after each flight, nit-pick the details, and would say that most flights are not 'perfect'. After you're finished your trip, do you grade your flight? What do you consider to be a 'perfect' flight, and what percentage of your flights would you characterize as perfect?