The feeling of satisfaction from a DIY job finished right. Today I fixed the ignition cylinder in my car, changed the oil and replaced the front sway bar bushings. Total cost: about $5 for two new car keys, about $11 for the oil and filter, and $6 for the bushings.
Even better, in the process, I discovered that the shop that did the alignment (after I replaced a tie rod bellows) didn't bother to untwist the bellows after adjusting the tie rods. It literally took me less than five minutes to remove the wheel, loosen the bellows, untwist it, and put the wheel back on, but I'm pretty disappointed in seeing them take such a shortcut that saved them maybe 30 seconds at the time.