I've taken multiple breaks during my time with XIV, played other games and eventually come back. Nothin wrong with taking a break, maybe it turns out the game isn't for you, maybe you'll end up missing it and come back sooner then you think.
Personally I still have plenty to do, finally getting my crafters up amongst some other things. But even when I had plenty I would take breaks, even if XIV had much more to it I'd probably end up taking breaks inbetween certain parts anyways.
That said atleast currently I'll atleast get on every patch for the story. I enjoy it, thats the big thing that keeps me coming back even though its also probably the easiest thing to just watch others enjoy.