Yes they should, but it shouldn't be a primary facet of the score. Being lazy and shoveling out ugly games should not be tolerated and the scores should show that. Of course gameplay matters far more and that too should be reflected in the scores.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception







