Oblivion is like Marmite, you either love it or you hate it.
I personally hate it, the world is too big. The combat system fails in my book and combat seems bugged, and doesnt entise me to play it more, I recommended KOTOR because they are equally as good to play as the Witcher and last ages. Dont know why but Oblivion is one of the worst games i have ever played.
i find the combat in KOTOR lacking and parts of the game are very linier it does have a great storyline but it was the only bit about it that kept me playing.
i loved oblivion, the combat at times was a little buggy but u feel like your i the thick of it also it has a pretty good storyline/s and nice graphics.
I'm loveing the witcher i think it is the best of both worlds and the best RPG for a longtime