I agree that they should have added more skills, attributes and birthsigns, but classes, again, not too crazy about them.
I loved picking major skills and then thinking up a name for my class.
It could fit his background, his aspirations, I remember an Orc who I gave the class 'Usurper', because he had come to Cyrodiil to conquer it.
I like the notion of picking major and minor skills at the beginning of the game, it allows for replayability because it allows many different ways to experience the game from the get-go.
Skyrim? The lack of choice, the lack of meat on the bones and the lack of RPG just makes it less interesting to replay the game.