Beetlecrab Audio Tempera is the most inspiring electronic musical instrument I own. I got it in April, and I’m still finding new ways to use it. It does so much.
Oxi One really is the hardware sequencer to rule them all. Though I’m sure you could get by with a Hapax or Deluge if you don’t mind spending twice as much.
Not a purchase, but Csound has always been an invaluable companion to my music making process. It’s also entirely free and open-source.
Not mine, but a friend of my dad’s would talk about the time he was an “asshole bagger”. He worked in a slaughterhouse, and his job was to cut a circle around the anus and pull up all the bits that might have poop in them and bag them up. He lasted a day.