There's nothing like the feeling of going back to an old favorite. You might or might not be enjoying Champions Online, but either way it could inspire you to go back to City of Heroes to see how the old stomping grounds are faring. Final Fantasy XIV might put you in the mood to take a trip into Final Fantasy XI just for nostalgia. Or maybe it's just the time of year that makes you think back to when you first fired up EverQuest and you want a chance to play around a little more. So you reinstall, resubscribe, and... where the heck did everyone go?
What games have you headed back to only to find out that the critical mass of players had departed? How do you cope with adventuring again in an empty world? For some older games (EverQuest and Final Fantasy XI spring to mind from the aforementioned) you're more or less up the creek without a paddle if you don't have anyone around to play with, which exacerbates the problem. So how do you deal with being the last one left to turn the lights on or off?