This is my third comeback to the game with well over 1000 hours under my belt. I go through phases. I look for games with a high level of replay value and Skyrim delivers. I know that it won't last forever but I feel like I got my money's worth and then some.
Take a break. Try a different character. Try a different style of play. Skyrim is a great game for the vast number of ways it can be played. I chuckle at the folks over on the GTA 5 forums that think GTA 5 is the ultimate in free roam. I don't care if GTA defined the genre. I haven't sunk half as many hours into it as I have Skyrim. Maybe I'm biased because this is a fantasy game and I
fantasy more than any other setting. But it FEELS more diverse than any other similar game I've played due to the sheer number of different styles of play. I may lose interest but I know that as long as my xbox continues to work, I'll come back to it again.