I agree with the OP to a point. I am fond of saying "Skyrim, the greatest game that ever svcked."
For me though it's just the sloppy, sloppy, sloppy tech work they did here coupled with an obvious lack of REAL writing talent as far as dialouge and questlines go. I mean some of the glitches, bugs, and just the way things are poorly implemented and questlines poorly writtin are at times enough to make me want to punch a hole through a piece of drywall...
However, I can give them "half a pass" on that becasue of how huge, ambitious, and stuffed full of content the game is.
1.) Open sandbox fantasy world with dragons, vampires, assassins, necromancer covens, etc...
2.) Tons, and tons of things to do. If you say it's all boring and dumbed down, well...thats a hill I won't die on. I enjoy most of it and find it fun, but I see peoples' point on this. They just don't make RPG's like they used to (unfortunatley), so go play "real" RPG's like Baulder's Gate, Planescape Torment, Arcanum, FO 1-2 etc... if you must. I know I still do sometimes.
3.) I find the world simply gorgeous, even on my 360 with mid range pop-up textures and frozen waterfalls. Not only that, but just the way they planned and laid out the landscape is imo very, very well done. I would have prefered a little more open wilderness between towns but I understand they had to be limited with this. If they had half as much talent for writing quest lines, deep interesting dialouge, and squashing bugs as they do for world building, Skyrim could have taken over Baulder's Gate as my #1 RPG of all time.
4.) Fun and satisfying combat. Could it be better? Of course, much better; but I find it fun. There are some balance issues with people being able to make "super weapons" and destruction magic not scaling very well into high levels and at higher difficulty settings (this one is a real bummer for me), but over all I have alot of fun with it for what it is.
If I had my way the combat of every RPG would be tactical and turn based like the new X-Com, or "Temple of Elemental Evil" (a greatly underapreciated game as far as the depth of combat goes, imo.)
But I am a 34 year old dork from the old school that remembers when RPG's were more of a niche product for other dorks from the old school like me. Now it's all about increasing accesability to vastly increase the amount of $$$ you can generate. Even though that makes me cry a little inside, I understand that $ talks and you know what walks.
So thats 4... O well, 5-10 would be fluff anyways.