I experience a lot of serial enthusiasm. These are things about which I have often & repeatedly been enthusiastic:

• ThoughtManagement tools - outliners, mind maps, wikis
• Writing - tech books, fiction maybe
• WorldWideWeb
• Being an InfoFreako - RSS & Atom
• Social software - ActivityPub, other stuff
• VideoGames and GameDev
• MediaProduction tools - streaming, podcasts
• Whimsy, being goofy, making fun of myself
• Animals - especially cats, bunnies, and crows
• RetroComputing - C64 and other 8-bit computers, arcade games