A day when the temp is in the high 60’s, low humidity, deep blue sky with a few big puffy clouds.
When all evening I can’t seem to catch my cat’s attention and I conclude he’s just using me for food and shelter…but then right when I’m about to fall asleep, he climbs on my chest and purrs. If I was just a food and shelter supplier to him, he wouldn’t bother doing this. And this thought makes me happy.
<snark on>No, you’re also a warm bed to sleep on. <snark off> 
J.
Loud fuzz guitar.
I’m an artist, and each piece takes me about 5-6 weeks to finish. But the one I’m working on right now is very complex, and I’ve been working on it for several months. It’ll be finished in about 2-3 weeks. Then I’ll be able to stand back, looking at the finished piece, and say “Wow, I did that!”
That’s happiness.
Going to convention with my grandson, and have him play Pathfinder without any of his family around for hours, then coming back to me and telling me that I really am the greatest Gamemaster in the world.
Sliding down any playgrounds slide, swinging on any swing set, and going to lots of playgrounds to slide, spin and swing. I am 22 years old.