So getting back to the OP -
Sake I could get very fussy about. If you havent explored that world - its as full of variety and nuance as wine is. Nothing like a lovely junmai daiginjo sake

Watches. I'm new to the world of watches but wow. So much variety and nuance, and like wine, there are ways to enjoy watches without spending a fortune.
I'm a hobbyist cheesemaker. You HAVE to be fussy about hygiene there or you will be making toxic bacterial messes.
Some of my wine drinking friends are serious audiophiles, to the extent of building their own gear. Some lovely analog setups in their homes
I think I could get very fussy about tea though, learned a heap about it on our pre covid holiday in Japan.
A thing i'm NOT fussy with - coffee. And I get crap from people for that.