It used to be that I always played on easy because I didn't want the story of games to be inhibited by their difficulty.
Now that I'm less of a pussy, I play games on normal, because I would assume that game developers made the game with this intended experience in mind, and any fake difficulty [http://tvtropes.org/pmwiki/pmwiki.php/Main/FakeDifficulty] gimmicks or simply difficulty to the point at which it obstructs coherent experience would only serve to dilute the game.
Now that I'm less of a pussy, I play games on normal, because I would assume that game developers made the game with this intended experience in mind, and any fake difficulty [http://tvtropes.org/pmwiki/pmwiki.php/Main/FakeDifficulty] gimmicks or simply difficulty to the point at which it obstructs coherent experience would only serve to dilute the game.