In Kingdoms of Amalur: Reckoning, every unblocked enemy attack always hitstuns you. I'm okay with that. I expect my character to react to getting hurt, and it's generally not too game-ruining since most enemies attack slowly and give you time to dodge or raise your shield.
It becomes annoying when you get to fighting Sprites and Wolves. The wolves appear in groups of four-to-six at a time, so while you're avoiding one of them, another will hit you. Dodging them is practically impossible because they hardly telegraph their moves and their lunge attack will get you from halfway across the forest.
They are not nearly as annoying as sprites, though. These little punks appear in swarms of as many as twelve at a time. Getting hitstunned interrupts you if you are swinging your weapon. Sprite swarms take forever to defeat because for every sprite in front of you, there are two behind you, and they will hit you before you can hit their friend. Oh, and sprites usually appear as "ambush" encounters, which just show up out of nowhere all around you rather than being on the map so you can see them coming.
The only efficient way to deal with either of these enemy types is to use a warrior skill that makes you immune to hitstun....at the cost of a good chunk of your mana, armor rating, and max health.
These enemies probably won't kill you, because they have low health and do very little damage per hit, but they certainly are irritating; especially if you play a slow-moving tank character.