Right now I'm sitting with a cup of tea watching and listening to birds on an overcast day. That's three things! But yeah, anhedonia ruins a lot.
Reading, language learning, writing, drawing, video games, listening to music (violin), strategy games and puzzles, mathematics, painting, philosophy, animals, life sciences. My pets. Electrochemistry. Pearls, if I had money I might collect pearls and maybe get into geology so I could have an interesting mineral collection.
Probably most of all just nature. Verdant spaces and cool, fresh air. The sea, estuaries.
I notice we have similar tastes in ambience around here.