Soon, Deathwing the Destroyer will spring forth from his exile in Deepholm and wreak havoc upon Azeroth. The world (of Warcraft) as we know it will never be the same again. Some locations will be mostly unchanged, while others will be completely unrecognizable.
One of the things I'm looking most forward to in Cataclysm is having my characters wake up in the newly changed world and experience that "Holy cow!" moment. When I get home from the midnight opening of my local game store and install the game, I want to log in at the most interesting and significant place I can. I plan on taking some time during that last night to move my characters to certain specific locales.
There are many places to choose from. Where will you log out the last time before the expansion? Will you choose a place that will experience a big change, like the bottom of the Shimmering Flats? While it might be fun to wake up underwater -- or will you be floating, or ported to the speed barge? -- there might also be a million other players who had the same idea. You may want a more secluded and original place. Other zones with big changes like Desolace or Blasted Lands might be less crowded and still provide that "whoa" factor.