I agree Endo, it is past its prime, but it is still top of the MMO's. It will no doubt continue to decline until such a time that people have moved on to Titan or whatever.
Since quitting WoW personally, I have moved on and tried other games and activities I didnt have time for whilst playing WoW. Ive just got Borderlands (yeah im well behind!), was addicted to minecraft for quite a few months, Terraria is also a top fave and just recently as well Ive got back into programming and switched to Android development as a hobby and possible small income generator on top of my 8-4 mon-fri job. Im enjoying myself now and spend more time with the wife than turning up to fail-raids with my ex guild.
I dont regret my time in WoW, as I did enjoy it up until a year ago when I quit for a short while before returning to Cataclysm. Again I got bored of that quickly and havent been on since.