I like Overclocking for juicer framerates and Downclocking for saving battery.
Patching Games with 60 FPS patches often comes with the need for overclocking. So some game modding is also on my list.
I've recently dived into theming. I know it from 3DS and I think, that 75% of the themes online available are garbage (because of bad contrasts, absolutely no "soul", or simply low effort). I'm also not an early adopter of new features and with the spend patience, some beautiful themes are available now. It looks so clean an beautiful now
Emulators and a few Homebrew Games are also great. One of my dreams would be some very cool homebrew game that just uses the Switch's capabilities like the techdemos show. The feeling to have the opportunity to do this stuff on my own, if I could inspire myself with an idea is also great.
Yeah… and
sigpatches of course. Because of comfort.