If u like midevel tipe games with magic, dragons and a lot of hacking and slashing, this game has it. U doin't have to stay on the main quest line all the time. There are tons of side quest and plases to visit. The game can go on and on though which is its stongest and weakest point at the same time. Countles times if found myself lost in the game for hours, 10 hours to be exact and you doin't even notice the time going be.
So if ur tire of playing games that you just get in to and already finish the story line go for this. You can also try Oblivion but Skyrim beats it by miles.