Loops, Journeys, and Single-Player Gaming

So, I've been thinking lately about "loops" in gaming. Not in terms of the "core loop" of a game, but in another sense. I've been looking at my gameplay habits, thinking about what it means to "complete" a game, thinking about my large backlog of games that I own but haven't finished, and thinking about where the bulk of my playtime goes. I pour a lot of hours into multiplayer games. A lot of hours. Hundreds of hours. It's got me thinking about how I spend my time, and about what I get out of that time. So, I've been thinking lately about "loops" in gaming.