I disagree with this comment.
WOW, is nowhere near the best MMO on the market, it was surpassed a long time ago in terms of gameplay. It literally looks like you playing a game from 10 years ago, which is almost correct in terms of the games age.
Let anybody new to MMO's play something like Guild Wars 2 for a day then WOW for day and I'd bet they'd choose Guild Wars 2.
I tried WOW for a month when I was playing Age of Conan, and I've got to be honest here with you - I thought it sucked, I did not like it one bit. Character Customisation is terrible, you literally feel like your playing the same toon as 100,000's of other players, which completely ruined the immersion for me right from start.
Where WOW succeeds is the amount of players it has and the amount of money it makes. It's by FAR the largest MMO, constantly being updated and is generally bug free... plus it will work on any piece of shit spec PC. So in that sense it is no1.
GW2 was a total bust. Swtor was an even bigger bust.
GW2 had better graphics sure. But that was it. The questing is even more repetitive than WoW with the need to repeat the same events over and over. And when you finally do cap, you find out the the end game is horrid.
Swtor was a humongous bust. It's "dynamic questing" was generic MMO grinding with voice acting.
The proof is already there. WoW is the only game that has sustained the amount of subs it has had for this long. Sure it. Is slowly dwindling, but the amount of people that play it over GW2 is pretty large.
Like it or not, WoW shaped the MMO landscape. That's why when an MMO launches, it is immediately compared to WoW. It's end game is FAR superior to any MMO on the market.