That sweet sound of my old truck's inline six groaning to life yet again.
Owning ricers with same truck.
My cat trying to lay on my lap all the time
The sweet song from my engine when my front tires shut up, the wind noise dies down and there's nothing but empty roads and blue skies for miles.
Hearing and feeling that big block start up for the first time in 6 years, knowing that if you hadn't rescued it, it would still be in a high-school auto shop getting kitty litter poured down it's intake...
Seeing that auto move again, after all these years, because you slaved away from 4AM to 11:30PM to install that engine.
Sitting down infront of a pile of legos and, two hours later, having a fully radio controlled mobile crane that can lift a soda can. I've done this before.
Relaxing infront of the TV watching your favorite real life racing series, and your fav driver avoids all the wrecks and mishaps and wins the race by a bumper.
Pizza. 'Nuff said.
Lol'ing at the guy riding your :censor: when your truck decides to miss and produce a cloud of rancid black smoke, then start running perfectly again.
And finally, that sweet sound of that inline six going to sleep when I get home in the afternoon, when I tell it to and not a second sooner.