The kind of RPG game that everyone should give it a try
As a lot of people already know, this game requires a very powerful PC. It doesn't mean you must own Intel Extreme and ATI X1900XTX. However, you will lose significant amount of visual details and that is huge as visual details are one of the biggest reason for you to own this game. Another known problem is that this game has handful of bugs. Although many of the bugs were fixed after 1.1 patch, it still doesn't seem to be perfect.
Also you should keep in mind that if you were looking for the absolute realistic social world from Oblivion, you can be disappointed as some of the game's features are quite unrealistic. For instance, you can suddenly move backward in the middle of the air while you were jumping forward by pressing back key. This is not just unrealistic but it is just not possible. You might lose your interest of this game if you were told these kind of gameplay, and you wouldn't want to spend your money for something you wouldn't play ever again after the first try.
Obviously, if you don't think that's a big part of the problems (and yes, it is quite negligible, but many people seemed to care) or if you simply just don't care, this is the game you should try. Be prepared to spend a lot of your time as well, as most likely you'll find this game very attractive.