I don't think I've ever used the first-person view, in either XIV or FFXI. The lack of true mouse look option (i.e. having to hold down a mouse button to look around), and the exceedingly narrow-feeling FoV, makes it a highly unpleasant experience for me. To say nothing, of course, of the flat-out inferior performance in combat, given how AoE effects are indicated.

I suspect it's one of those things where it's a neat novelty for people who don't typically play first-person games, but I play real FPS titles routinely, and the FFXIV version of the first-person view is painfully bad.