I guess film? yeah, there are a lot of prestigious cinephiles who watch a lot of movies.. but I wish more people would just pick their favorite actor(s) and watch their entire filmography for fun.. pirate everything you don't have!! it's so easy.. sure, there's always a couple obscure things that are lowkey lost media, but it's still so fun to go through someone's filmography.. even the movies that look terrible, watch them anyway!! you won't like everything, but you will also find a lot of things you didn't think you'd like!! Idk if this counts really as an "underrated thing", but I just don't know anyone that ever really commits to anyone's filmography.. depending on who you pick, it'll take a while to finish, but it's the coolest boredom solver ever imo.. but maybe I just think that because I love film so much.. but I digress