I have a large selection, but I rarely use them for anything other than media keys and teams call functions. Other stuff like windows management in sway are all done on higher layers on my (40%) keyboard.
My preference is for something with at least one knob as knobs are my preference for things like scrolling, volume control, and zoom.
If you can find latching switches, these are great for triggering layers so you can get more out of your pad. You can obviously do latching layer changes without such switches in QMK, but you really need to trigger leds to help you remember which layer you on otherwise.
Pad I use the most is a CapsUnlocked CU7 that I got just before they imploded as I love the weight of the knob.