It's a really well put together video that honestly sweeps me right back to day one of the game, when I stumbled through the night elf starting experience and delighted in the fact that my night elf sometimes flipped when she jumped. This led to years of compulsive jumping and several keyboards worth of play, all of which were totally worth it. And although I'm Horde now, I still remember those first months of frolicking as Alliance fondly.
Take a look at the video, and be sure to crank the music up -- the sweeping blend of soundtracks from vanilla to now is always worth a listen. And while you're at it, why don't you leave us a comment with your favorite or earliest memory?