There's a lot that I love about OSRS but I'd say the quests and skilling are my favorite activities by far. While I always just use a guide (shoutout to Slayermusiq1), I find them way more interesting and in depth than other MMO's quests. What would be an entire quest chain in WoW could just be one quest in OSRS. As for skilling, there's just something relaxing about grinding out some stats while watching a show or just chillin