I started my 3rd character in as many weeks last night. It seems I just can't decide how I want to play each character. I started a Breton 1HSword/Shield warrior last week. I like to roleplay a lot on my character, and made a lot of 'honorable' choices, helped people, did the Companions quests, etc. Then I decided I would do Thieves Guild and DB quests, because they are part of the game. It is strange, but as soon as I took the first DB contract, I walked out of the DB cave and was thinking 'This is not what my character would do.' It totally changed the way I looked at my character and I immediately wanted to start a new one that is more of a bad guy.
Anyway, I started a Redguard 1H sword/shield warrior who is bad, and I plan to play him completely different from my other guy.
This is part of what makes this game 'potentially' be so much fun. You can play your character in so many different ways.