I would just mark it up as a difference in taste. I like New Vegas, but feel that I'll get much more play time out of Skyrim.
I think I'll have to do the same. I keep hearing how great New Vegas is in terms of story and that always-nebulous concept of "depth" but I didn't see it myself: to me, it was just a slightly more bland version of FO3, though still enjoyable. Am I saying those people are wrong? Not at all, unless they start talking in absolute terms with regard to which is "better": which I think is ultimately the problem when this sort of thing crops up; "better" can sometimes be objectively measured, but more often than not it's just a matter of personal preference.