I played EverQuest from Beta (1998) to 2004. I was then invited by a friend who was working for Blizzard at the time to join the Beta of World of Warcraft...and I never looked back.
However, I am on a break from the game at the moment (put my account on hold back in November). I play Jahpali (80 BE Paladin) and Jahzeal (80 Orc Hunter) on Silvermoon. I love the game, but lost a little interest after the guild I had been in for the past several years had a nasty split and several of my buddies quit the game. We were farming everything except Uldaur (which we were just about to conquer, as well).
I am tempted to play again...
As a side note, my wife also played for almost three years. She liked the game, but finding time to play together with our four children running around was impossible.