The natural world. Both at the micro level of looking at the symbiosis between tiny insects and plants, to the macro of untouched natural landscapes. Also clouds! We forget to look up and see how cool clouds are.
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.
The sheer variety of cultures, especially with clothing, food and housing and arts too. I love arts, especially music from different cultural backgrounds. Also the ideas. However, someone will always take those ideas too far, which is the root cause of many problems we face today.
What I love about the world is how there's no limit to the things we could learn. There's so much out there to discover and it feels like there's no end to it. It's freaking amazing