I put "washing" for a couple of reasons. First, it's what I do most of the time so you learn to love (or hate) what you do most often. As much as I like correcting paint, it is something I am glad I don't have to do on a regular basis, mostly because of everything that it involves. Not only to I have to wash the car, but also decontaminate, polish, and re-coat or re-wax. It is just a tedious process that I love, just not all the time.
Secondly, and it has been mentioned above, but I get to put my headphones on and just zone out and listen to my music or the radio and go into my world. It's the most relaxing part of the day, even if it is hard work on occasion and aggravating when you miss a spot on the wheels.
A close second was applying a wax, just because that is what I did when I first got a car. I didn't know about the dangers of the car wash so I would run it through the tunnel and then go home and put a fresh coat of wax on the paint. I had a big, huge SUV (Range Rover) so you can imagine any chance I had to not wash the car by hand I took! Nowadays I'm playing with coatings so waxing is not a monthly or bi-weekly thing, but washing sure is! And thus why I had to choose it!