UPDATE: I already role play. Maybe I didn't make a clear enough message, and for that I apologize.

Here are some examples of what I wanted. These are things I can think of off the top of my head. If I'm missing any or I am incorrect, feel free to fill in the missing pieces and/or correct me if I'm wrong.

End Game/Generated Content:
- Bounty hunting. Talking to innkeepers/stewards to go to new/found locations and take care of the bounty.
- Faction Quests. After the main faction quests are done, you can still find jobs to fight, steal, assassinate or find lost objects.
- Randomly generated events. This includes dragon attacks, thief attacks, assassination attempts, etc.

That's all I can think of. I was wondering if there are more of things like these.

ROLEPLAY it makes all the difference in the world.

Definately role play. Build a story and let your character tell it. It will be so much more enjoyable. Then when your story's done, make a new one.

You can play an explorer who wants to discover all the 'map locations' in the game. I believe (including all console DLCs) there are almost five hundred such places. Maybe he has to sneak through every single one or actually clear them all out. He'd have a heck of a trophy room back home...