Specific things that bring me joy
Spinning way past the point of being dizzy, until I fall over
Stamping on bubble wrap
Stimming on a mechanical keyboard, game controller with good clicky buttons, or other similarly tactile doodad
Getting head scritches and back scratches and hair pulling
Play-fighting and absolutely pounding someone with a pillow at full force
Going up to a high place just because it looks cool
Biting a partner's skin. Really sinking my teeth in there
Going fast downhill on a bike
Getting that light bulb moment in a puzzle game
The moment hot water courses through my hair when I take a shower after a long run
Really fast roller coasters
Complete and total immersion in a book
When a stupid meme hits me at precisely the right angle when I'm in a really weird headspace and I absolutely lose it and cry from laughter for the next hour
Being driven somewhere, anywhere, by my partner