I've beaten Skyrim I don't know how many times. Completed every quest I've been able to find including the misc. quests. Early last year I got bored and decided to create a character and do the OI glitch to get him to 81. Since then there's been a whole new world of opportunities and fun that I can partake in. I've especially enjoyed my level 100 black smithing and enchanting. Building super powerful weapons and going bananas on all those who cross me. However, I can only enjoy my dragon bow so much as I've completed all the fun and action packed quests. I have another character but he's only level 30 and I'm just about done with all the fun quest lines.
Ideally I'd like to be able to play the game from the beginning with all of my stats, armor, and weapons since I don't have the ability early on in the game. A suggestion that I have is allowing for an NG+ option or a quest restart option. Something that allows you to keep your character stats, weapons, armor, and gold but allow you to replay the entire game from the beginning.
My theory is that ESO will occupy Bethesda's time for next couple of years. Anyone not looking to take part in the MMO could find endless enjoyment with Skyrim still if there was the ability to play the game again without having to start over their character.