I get really bored playing alone. I almost always play games online. Even just knowing you have the option of joining others in a game, while mostly playing alone is more of a motivator for me. Like if I want to get good at a game or have awesome gear, at the end of the day if you're alone no one is going to be interested with it. Part of the draw of WoW to me was to gear up, then max out the DPS charts in a raid. Skyrim lost me once I got pretty far, then I realized everything was basically scaling to my gear and I started to wonder what the point of continuing to play was. I've been playing Dragon's Nest online lately, mostly solo, but the idea that I could get good and play with others is a motivator for me, even if I never get that far/good.