1. Hell fucking no. New Vegas had an excellent and complex mythos that wrapped up the massive storylines of the previous games perfectly. Plus, the actors who gave it a voice weren't all shitty Swarznegger impressionists with no sense of feeling. Granted, Bethesda games aren't exactly known for their prowess in voice acting, but a better job was done here, I feel. (Except for Sheogorath and Cave Johnson, they were gold.)
2. Atmosphere of New Vegas: The destroyed and oppressive ruins of an old world, filled with the cheery and patronising relics of an ignorant, blissful past. Factions that actually felt like they were in conflict. The feeling that your choices actually made a difference between things that would happen, as opposed to what things you would and wouldn't be able to obtain as loot. Atmosphere of Skyrim: Wow, this place is big! I'm a viking! HOLY SHIT I'M PUNCHING DRAGONS!
3. Can't argue with you there. The ability to choose everything down to the pattern of stripes on my catgirl's ass far outranks the decisions allowed to me regarding what kind of mustache I'm going to slap on my Mexican.
4. Yeah, because heaving your weapons around like a cerebral palsiac is way better than actually kicking ass in battle, boxing like you actually know what you're doing, and being able to dismember your foes as a satisfying reward, where Skyrim will maybe give you a fatality if you're lucky, and a decapitation if you're a hacker.
5. Because the occasional nod, two cowboy robots, and the local accent make it a whole bag? Well, by that logic, I'll have you know that Skyrim is just a bunch of cliches stolen from LOTR and Braveheart!.