Rhythm Heaven might be one of my favorite rhythm game series of all time. It's kind of hard to compare with other rhythm games, because RH isn't really like DDR or Guitar Hero or Osu! where the harder songs = more notes to hit. There are some songs where you might only have a couple dozen inputs, but you need to be exact on all of them. It's charming as hell and I love it, and Dolphin running RH Fever works greeeeeeat on the Deck.
Dang, I need to give it a try. I've been wary of RSI with the super fast games, didn't know it was possible to have hard levels without destroying my hands.