What about the dragons? They get excessively dull when you fast travel somewhere, chat to someone about doing something, only to have said person cut the conversation short and try and kill the dragon. Then the inevitable happens, I throw a fit of rage because it has happened too many times.
And the dying. I have died many times, all because an enemy takes approximately half of my life with one hit. I did like it on Oblivion when you could just become a daedric armoured tank and destroy absolutely everything.
Oh and the dragon armour, in my own opinion, is really, really, very ugly.