However, if you look it not as a role-playing game, but an action game, then it's a decent one, I suppose (compared to the other action games available). Still repetitive with quite shallow game-world, though.
Sorry, but this is absolutely wrong. If Bethesda games were decent action games, then their other shortcomings could be somewhat forgiven. But they are not. An example of a good action game set in a large open world is the GTA series. There, the combat is fun, driving is fun, the world has a lot of neat stuff you can play around with, and heck, even the stories are and dialogue are usually better. In Oblivion/Skyrim, the combat is abysmal by action standards, there is not much else to do, and the worlds are bland and boring.