Mine is barefoot. They are tender at first if they're used to shoes, so you have to ease them into it--but just like ours would, their feet get used to it! The individual horse is always different, of course, so some are too tender-footed in any condition, and others are tough as nails and will go full tilt over anything you put them on. I am buying easy boots for my mare for the occasions where I think she may have some trouble. Overall, she's pretty tough but we ride for hours on end over some pretty rough terrain so I'm choosing to buy those and use them for some of the rougher rides we do. I won't be using them daily, though.
A horse is the projection of peoples' views about themselves--strong, powerful, beautiful--and it has the capability of giving us escape from our mundane existance.