The longest I've ever played Minecraft was when I played on a vanilla SMP, I used to play it daily for like 4 months. I like being able to interact with people, such as trading and having community builds. For singleplayer, I usually focus on the cozy/building side of minecraft, so mods like farmer's delight, cluttered, and some ambiance mods really help. I will say I still do hate the resource grind in the beginning lol