As much as I love my mouse on my desktop, I like using a wired switch controller because it's my only controller with a headphone jack in it. Useful for when my bluetooth headphones are charging or in the future if I ever can find and buy a good quality cord with the jack at both ends.

Though I do like my trackball mouse for games/moments where I have to be quicker because there ain't no way I can set the sensitivity of the controller joysticks to be good enough for me. I'm falling things like Danganronpa V3's Mass Panic Debates. They're really not super fast, more medium speed IIRC, but they're fast enough I prefer a mouse. Especially for any V-shots.