My two cents: full looks much better, but I think there's something to the anecdote about limited being easier on the eyes and brain. I've set my screens to limited right now and it does seem to help the eyes relax. Probably the full enables some kind of dithering?
Also I didn't get a response back from Samsung about monitors between 24" and 27" that are full 8-bit instead of 6-bit plus FRC, so I assume they're still using that outdated tech instead of giving the consumer a proper 8-bit product.
Personally, I can't stand the idea of technologies like PWM and dithering where the eyes and brain are intentionally manipulated to compensate for inferior hardware.
Before I read about others reporting benefits from limited vs full RGB, I thought it was just my imagination that limited is somehow less straining. Again, it doesn't look nearly as good so those reviewing the vibrancy of a new monitor ought to be careful they are not doing so while the screen is limited mode because no screen is going to look very good in limited mode. However, I'm mainly interested in health and productivity. I get FULL color when viewing the real world without a screen, and that's good enough for me.