I can always pop in mario, or castlevania, or contra, or megaman 1 and have a blast. It’s such a good console. The arcade style play makes a ton of the library just infinitely replayable. Being good at games like contra or ninja gaiden is actually super fun. Even mario. I can almost 1cc megaman 1 nowadays. There’s still some randomness and parts that fuck me up. But there’s enough challenge in any of the games to last a life time depending on the bar you set yourself. Actually even just doing metroid mapless and blind is pretty hard if you’re just memorizing all the rooms.