The sandbox and openness of The Elder Scrolls V: Skyrim makes this the definitive roleplaying game in a lifetime.
Skyrim has got the whole package of a roleplaying game and much more. Quests (main and side-quests), items, food, weapons, armour, NPCs, monsters (trolls, dragons, etc.), animals (deer, mammoths, bears, lions, tigers, oh my!), enemies (witches, bandits, thieves, etc.), and much more.
The graphics are stunning, depending on what system you are playing on (PS3 and XBOX 360 graphics are still stunning, and the PC graphics are out of this world).
You will most definitely get your money's worth by buying The Elder Scrolls V: Skyrim, and you can be rest assured that you will be playing it for a long time.