I turned 44 last week. My belated birthday celebration this weekend will include a sparkplug change on my Ford Expedition. A fun job, requiring me to lay on top of the engine to access the rearmost plugs (buried to the point that I have to pull the injector rails) while using every accessory in my ratchet set on this front mid-engined monster. Out of principle (cheap), I refuse to pay $300 for a dealer tech to perform this task.
Putting the labor in Labor Day, I guess.