My main workflow mouse has been the Logitech g600 for years. I love having 24 different macro keys accessible with my thumb (stuff like copy/paste, ctrl+w, ctrl+shift+t, enter, etc), but it's terribly un-ergonomic and the software is terrible (and doesn't let you configure settings except through its eye-watering UI). And afaict, Logitech actually stopped making them, so I have to snap them up whenever resellers put one on Amazon, since the main mouse button switch has a nasty habit of starting to double click after too long.
It's to the point where I'm considering just commissioning a hardware hacker to make me a custom mouse.
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