World of Warcraft is full of amazing environments where we quest, level, and raid -- but we probably don't hold every in-game locale equal in our hearts. There are dungeons I've only run once or twice, and there are dungeons I've run a hundred times. There are zones I go out of my way to quest through when I'm leveling an alt and there are zones I avoid like the plague (and, no, I'm not just talking about the plaguelands). I'm pretty sure I'm not alone here: we all have our favorite game zones that we return to again and again.
Karazhan still tops my personal favorite places list, with a great story, great setting, great music (see above), and some unusual boss encounters that remain memorable even though it's been years since the dungeon was current content. But tell us, readers: what are your favorite (or least favorite) in-game locations? What are the zones you keep gong back to -- and which zones do you escape as soon as possible?