Reasons why I play.

The simple joy of FF really.

Getting new mounts, enjoying the story. Doing things in the GS. Crafting, Leveling other battle classes. Helping and teaching new players. So much to where you end up creating almost a side story for your main character with all the side stuff you do not pertaining to raiding or the MSQ.

Reason I wont spend time reading a book is because I have a short attention span while reading to where I will be reading and my mind will drift off while reading forgetting anything I have read.

Also playing a few other games outside of FFXIV helps balance. If FFXIV is all you play, then yea of course you are going to get burned out.