Always switch to third-person just to see how they implemented it, and then always switch back to first in less than five minutes. They have yet to do third-person in such a way that it doesn't feel like a camera hack. I prefer third, but when it's not done well, I won't bother with the perspective.
Depends. Mostly 1st person. But I no longer play the Vanilla games so...
Or 3rd person.... with mods :
Wow with those leg animations. LMAO. Looks janky as hell, but the combat itself looks like a significant improvement. Not sure which I would rather use honestly.
Combat was always my biggest peeve with the TES games after Morrowind. With that game at least it was somewhat forgivable. What wasn't forgivable was improving upon it at not only a glacial pace, but in such small increments (in some cases regressing). While Skyrim's combat is technically much better than Morrowind's due to it being less about die rolls, it still feels almost as terrible.
Secondly is the world itself. I absolutely loved exploring the overworld of Skyrim, but at the same time that led to the second most egregious flaw in my mind. The overworld is so good, and compels you so well to move forward, seeking out that "next mountain in the distance", that you can't help but to anticipate the big payoff once you reach your destination. And there never is one. The games are always about the journey to the destination, but not the destination itself. I also both like and dislike their dungeon implementation. I like the fact that they actually have dungeons at all, and sometimes they can be atmospheric, but despite the "no more copy/paste" claims of Skyrim, the dungeons still largely felt pretty similar.
Speaking of dungeons and combat: how on earth would the camera and combat mod work in some of the more claustrophobic areas?