It's the absolute best for me, because it's the only one that offers everything I've ever dreamed for in an MMORPG:
+Great graphics with very attractive characters.
+Tons of glamours to play with.
+This might seem silly, but being able to sit on chairs around the world, and having actual cool places to sit in like Limsa's restaurant, is a very important detail for me that most MMORPG lack.
+Characters turning their heads to look at each other. Something so simple that makes they look alive and aware of each other!
+Characters can even change their standing and sitting poses, and move their lips when they speak! What other game offers this kind of personalisation?!
+Emotes you can combine with head movement and facial expressions, coupled with the best camera system I've ever seen. All that helps me take all sort of creative screens and recreate stories, and I LOVE that.
+Housing, another creative tool.
+Game gets updates very often. Updates are fun (to me).
+Getting good gear is not an impossible feat. Game doesn't punish you with tons of mandatory, mindless farming and RNG like other games have punished me in the past. Thus, FFXIV has felt safe and not toxic for me, like fresh air.
The only things I might appreciate more from other games are the action combat system (albeit I don't dislike the FFXIV one), and a wider character creation with face and body sliders. But these alone don't make the other MMORPGs better, for they lack absolutely everything else. Most MMORPGs lack creative and social aspects, and merely focus on combat; there's nothing more to do other than combat. I tend to find that boring after a few weeks, no matter how nice the battle system is. If we add the P2W elements, and that each of the very little fashion options they might offer tend to cost more than a month's sub in FFXIV, you get the unhappy picture.
I think FFXIV has spoiled me too much *laughs*. It's given me so many things that now I won't be able to find any other game that's half as good.