I decided to make my HUD invisible to see how it wouldf affect gameplay . And I must say, WOW.
I may be exaggerating slightly, but it's almost as though I'm playing an entirely new game. For once I'm actually exploring, instead of just chucking a marker on my map and following the road to my destination; I do explore, but I still find myself following map markers, even if I'm not aware of it.
It makes fights more interesting too, because you can't see your enemy's health or your own. The only downside for me is that there are no hovering markers for doors, chests etc. and no crosshair, which makes archery a bit difficult. But I'm really getting into it and if you haven't tried this yet and are a bit bored, I would reccomend it for sure.