I spent years of my life grinding this game into the ground, ARR through Stormblood, and I can't say I ever got tired of it. The only reason I stopped was for my second child being born, and I never really picked it back up. It's a beautifully designed game, lots of wonderful dungeons and environments, and even the older raids are worth playing over and over. The only downside is that you'll never get the feeling of entering this world for the first time ever again.