I’m biased because I’ve been playing it since launch, but I’ve also dabbled in the others and simply couldn’t justify a sub fee when
a) there are so many other games I’d like to play simultaneously and not feel guilty doing so b) there’s no gear treadmill! It really sucks in games like WoW where I want to check out the older content to get up to speed and just the zones were dead. Conversely, I’m doing map completion with my wife in GW2 and even the core maps had a bunch of people running around doing dynamic events and world bosses. The game feels so much more alive!