Anyway, I've been reading a lot of topics regarding Skyrim and I realise that this forum is obviously a subset of the player community (e.g. you are already pretty 'hard-core' if you are reading a forum), but I am curious to see something.
There have been a few topics regarding issues like freezing water, dark nights, food, fatigue, fast-travel etc which have been floating around and it's difficult to get a good grasp of 'general opinion'. To expand the answers to the question:
1) This includes things like: a haven't slept & haven't eaten meter to encourage non-24/7 dungeon crawling, no fast travel (but alternate travel methods like mages guild/caravans etc), really dark nights to discourage (but not exempt) night-time escapades, more hidden leveling mechanics and a bunch of other things which might make some players happy but seriously annoy others.
2) A foot in both camps. There are one or more personal wants which are immersive (but potentially frustrating) which you want included.
3) You prefer games which are simple and uncomplicated: Fast travel is awesome, I don't want to worry about the time of day or when I last ate etc etc
4) Compulsory joke option