Ok thanks i will give them a try, last OT question, why Oblivion has a lot of problems?
Oblivion is known for having a bad leveling system. It might have been an attempt to make the system more simple, but it ended up being more complex than it should have been. Oblivion also might feel a bit bland if you are expecting the environment to be not Lord of the Rings-like. The devs even admitted they were really into the Lord of the Rings series when they were developing Oblivion. It has some pretty bad level scaling.
Other than that, the worst thing you can find that isn't just a problem you can ignore is the jarring invisible walls(this is more of a problem from how the game's world is not in an area that is enclosed by mountains or water) and maybe finding the Oblivion Gates repetitive.