Experiencing something that is truly novel to me, whether it's a culture, a food, a story, or any other thing, is such an exciting and rewarding feeling. That's a big one.
Spending time with people I love, and feeling loved in return from then will never get old, that's certainly up there at the tippy top.
And certain physical experiences are great too. Delicious meals, comfy pajama, music that brings tears to my eyes.
These are a few of my favorite things.