I use a mouse for my pointing device. I click most of my notes as well as short successive notes like triplets. I use z + x for streams and extremely fast/excessive triplets. Getting a new keyboard soon, so I wanna try using solely my keyboard for note clicks, but I'm not sure how that will turn out. Definitely not going to use keyboard only for clicks without a mechanical keyboard, I'm incredibly inaccurate when I try.
Ultimately, I don't think I'll ever buy a tablet. I've used one and it felt great, and I could easily get used to it and probably play better as a result, but I wouldn't get any other use out of it other than osu! I don't think so drawn to osu! that I'd buy a new peripheral solely for osu!
Not yet, anyway.