Ha, I just posted about my mouse in another thread - somehow missed this one.
I use a Ducky Secret M; a right-handed PBT-shell mouse with adjustable DPI and a little RGB going on:
I hadn’t seen them for sale anywhere for over a year so I’d assumed they were out of production - but it looks like they’re back in-stock. Compared with Ducky’s newer Feather mouse, I believe both the Secret and Secret M are larger and definitely more heavy.
The Feather is sold with a few different switch options; I believe the Secret ones have Omrons pre-installed. After a couple years one of the Omron switches started to go; replacing it was no more difficult that replacing a soldered keyboard switch - I had the whole process done in just a few minutes.