The Mechanism Deckmate, mostly with the Kickstand attached.
I also use it to attach a portable battery and the Kickstand to find comfortable gaming angles and while I’m charging it.
Other than that, I’ve got a pair of KSC75s to wear when I need them (I mostly just play my games muted anyway) and I guess the hall effect Gullikit sticks might count since my left stick developed drift.
I go by main genre - so Action, Adventure, RPG, ARPG, Rhythm, VR, you get it.
Then a Beaten, Beaten 100%, Shelved, “The Bin”, and a “Multiplayer” category. Games are allowed in multiple categories. The Bin does not hold many games, you’ve gotta earn being thrown in the trash.
That way, when I think, “I wanna play a Rogue Like” I don’t have to recall all their titles or anything. Then my Steam Deck came around and the default big picture view makes my sorting… Mostly useless.