I judge by the depth of the game, the vastness, and how many things you can do. WOW has arenas, battlegrounds, instances, pets to farm for, flying mounts, playing with real people as your "companions". I'm sure everyone has different opinions.. IMO wow is the most massive game ever, in terms of what you can do in it. Most of the games you listed have to be a joke. street fighter? I admit I loved it but it's so one dimensional in comparison.
Back when lvl 70 was the cap I had a Lock decked out in all arena gear and fought a pally decked out in all instance gear riding his war bear.. the fight lasted over 10 min, I know this because I used 5 death coils in the fight (2 in cool down). It was the most intense gaming experience of my life and I will remember it as well as any christmas in my childhood.