Recently got back into WoW

After playing just my Xbox all summer a friend convinced me to get back into an MMO you've probably heard of, World of Warcraft.  As you probably also know its quite addicting.  My gaming life has now become a balancing act between other games (mostly FPS's; Halo: Reach, CSS, etc) WoW.  WoW is in a league of its own when it comes to online gaming, no other game requires so much commitment and work to become part of the 'non-bad' group of players, and to be the best requires time few people possess.  So for my first post I propose the question: Is the sense of accomplishment I obtain from getting that new piece of gear, or downing that boss with nine to twenty-four other people worth the time I'm losing playing other games?  It seems so to me but I'm still not sure.