Car wash
It may be due to novelty, but I REALLY DO enjoy car washing.
It is therapeutic - lathering the smooth surface of my big boy, rubbing away the grime accumulated over the week, the mud that splashed underneath, the stubborn brown substance sticking onto the wheels. Then it comes to splashing water, drying it (and must be fast before the droplets dry up!) and, applying anti-rain chemical, waxing it to give the smooth touch. It is the biggest single object I can clean at one go. And I must say, my product is a lot more thoroughly cleaned than what you get from your friendly neighbourhood kiosk $7 wash, your JB RM5 car wash, and you foreign buddy who cleans the car of the entire MSCP with one pail of water.