It depends on the person or chest. Some things are random and others are not. For instance in the place where you get your first shout the last 'boss' or whatever dropped an enchanted Honed ancient nordic sword which I used all the way up until I got elven gear. The rest of the times I played I just got a basic enchanted nordic weapon. Same with chests, sometimes I got great stuff and when I go with a new character I got crap. I should also add that some quest rewards are random too, same value usually but different item or enchantment.