Isn't it, at least partially?
No, especially now that gaming is a mass medium on par with film, television and music. There is no correlation between quality and popularity. Here's the box-office take for last weekend:
http://www.rottentomatoes.com/movies/box_office.phpYou will notice that in the top ten there are films that reviewed extremely well, extremely poorly, and every where in between. Yes, video games are not movies, but as a mass medium the principle holds true. The Orange Box is an excellent game that sold very, very well. Command and Conquer 3 is a thoroughly competent, if not exceptional, game that sold very, very well. Deer Hunter is an extremely bad game that is one of the best selling PC games of all time. Oblivion selling well says absolutely nothing about the games quality.
You don't seem to understand. It is your OPINION on whether or not a game is good. You can, by very definition, not BE wrong.
Of course I can be wrong. I can hold the opinion that the Earth is flat, and I would be wrong to do so. Likewise, I could hold the opinion that The Aeneid is a bad poem, but I would be on extremely shaky grounds if I were to do so. I grant that judging a work of literature or a video game has an element of subjectivity which the shape of the Earth does not. That said, not all opinions are created equal, subjective or no. At the very least, the Aeneid can objectively be shown to be superior to certain other poems. In that case, you can still believe that the Aeneid is bad, but relative to the Aeneid there are objectively much worse poems in western literature. Likewise, you can believe that Oblivion is a good game, but relative to Oblivion there are games that are objectively much better.
You seem to have some difficulty understanding the difference between a MOD and a TOTAL CONVERSION.
Obscuro's Oblivion Overhaul is damn near close to a total conversion. The only elements of Oblivion it doesn't effect is the level geometry, and static content (i.e. quests and dialog). Other than that, you are playing a whole new game.
Again, you find it not worthwhile playing unmodded. Many others do.
Would you enjoy that Bethesda-made static content so much if the underlying game hadn't been fixed by mods? Some of the dungeons of Oblivion can be fun, ESPECIALLY when you have the hand-placed loot and challenging combat encounters of OOO and other mods. That static content which you claim to love so much loses a lot its charm when you have to go back to Bethesda's shitty technical (i.e. mechanics) design.