Board games, hiking, swimming, biking, FE, reading, writing. And eating.
Are you ever planning to try a Hard run of SD? I personally would advocate for trying it. I've had a blast on H4, but H2 or H1 are probably more your speed in terms of enjoyment. (The bosses are evil on H4, and the incessant crit rates aren't fun to deal with. Otherwise it's very well-designed so far.)