Are you returning to World of Warcraft for the expansion?

If you're at all interested in MMOs, it's been nigh-impossible not to learn about the upcoming World of Warcraft expansion through osmosis if nothing else. If you're currently playing the game, of course, buying the expansion and logging in is a no-brainer. But if you're like many people with an old account and some mixed memories about the game, buying the expansion isn't a given. It all comes down to the expansion's features and how satisfied you are with your current games.