The best Xbox 360 game to date!
First up there is a very detailed character creation system. Can change almost every facial feature of your character. There is a wide range of races, classes and professions to choose from. The main quest will probably only take you between 30 - 40 hours (did I say only?) and the side quests will last even longer. Add them together as well as the fact that none of the mission really feel repetitive and you have excellent value for money. The controller layout for combat is extremely easy to get used to and there is an extremely large amount of weapons/armor/spells you can use. You can buy horses to get around faster an houses to store all your treasure you "acquire" in.
Graphics:
The first thing I though when I started it up was, "this looks like a cg movie sequence". I knew it wasn't but the graphics were that good. Everything reacts the player. If you want to walk into chains hanging from the roof to make them move you can do just that. I quite often found myself climbing up really tall hills just to look out at the enormous land. (It really is good to look at)
Sounds:
Amazing. All voice overs where recorded very well and sound very clear. The sound effects were very fitting for the feel of the game. Music fitted perfectly and added to the atmosphere well.
Concluding, Oblivion is without a doubt the best game (in my opinion) for the 360. I recommend it to everyone because it has sooo much value for money. I'm still doing side quests and I've had it for at least half a year.