This is an interesting list. I found it interesting enough to come up with a reply to each point - and I mean that as a compliment. So I hope that what follows does not sound overly critical. I don't mean it to be.
1. I have no interest in this. It's not my goal to feel that I am the character I play. I roleplay that my character is someone else. I travel along in an advisory capacity - we are a kind of "party of two." For this (and many other reasons) I will always play in 3rd person.
2. I mostly agree with this. But occasionally I play a character who is unruly and rambunctious. It would not be good roleplaying on my part to force these characters to walk up stairs and to follow paths. In my opinion a true roleplayer allows the character to make the decisions. The instant I step in and start making decisions unilaterally, I cease to roleplay.
3. Again, it this should depend on the character, should it not? Some characters may prefer to travel at night. I might be roleplaying a thief hiding from the law, a hunter stalking nocturnal beasts.
Also, you're going to have to explain to me how not using a torch is going to make a game feel more real. When I need light in real life I use a flashlight, matches, anything I can get my hands on. If my goal is to make my game feel like real life then my character is going to use a torch. Unless, that is, my character is afraid of fire or has some other roleplaying reason to avoid fire.
4. I agree that characters should sleep. But how much they sleep, when they sleep and where they sleep is up to my character, not me. It is not going to make sense for some characters to sleep in a house (some of my characters have never owned a house) or an inn (some of my characters never enter a city). And forcing my characters to sleep only during certain hours goes against my idea of roleplaying also.
5. I agree also that characters should eat and drink. They won't necessarily eat and drink at night and they won't necessarily buy the food, though. My characters wait for the effects of ingredients to wear off too, for the same reason.
6. Some characters like to get drunk and some don't. I like your idea of saying the wrong things to NPCs under the influence, though. It's never occurred to me to do that. That's good - I'm going to try that next time one of my characters gets drunk.
7. Some of my characters, for various idiosyncratic reasons, do not ride horses. Most of these characters run/walk everywhere (I use a mod that slows everyone, my character included, down to a walk when Fatigue hits zero). They also use a mod that adds Morrowind-style transportation.
I see map-based fast transport as a kind of magic. So my magically-inclined characters use it. I roleplay that this is a pretty advanced form of magic, one that requires much study and dedication to master. So these characters usually do not "learn" this power until after level 15.
8. I don't understand why resting to heal is forbidden but using potions to heal is okay. To my way of thinking, resting to heal is more realistic than drinking a magic potion. And why is resting bad but sleeping is okay? I walk 40 miles a week in real life and I can vouch for the fact that resting - with eyes closed or open - is very rejuvenating!
I will more often take the opposite approach. Many of my earlier characters have been warriors who are suspicious of magic. These characters would die rather than drink a potion. But they would rest/sleep anywhere at any time, if they could get away with it. My more magically-inclined characters, on the other hand, had no problem drinking a potion.
9. This is great. I do this too...when it is appropriate. As with everything else, it depends on the character and on the situation.
10. In theory I agree with this. And generally I abide by this too, when I can. But in my opinion Oblivion's hotkey system is terrible. Mages in particular accumulate spells quickly and those 8 slots can fill up real fast. Some items and abilities and spells just can't be easily hotkeyed. I'm sorry, but my character is not going to go without something she needs just because Bethesda did a poor job of designing their user interface.
One single all-inclusive set of rules might work for you, especially if you're only playing one character. But for myself, I play many characters. For me, this kind of approach is unworkable. I believe that one set of rules for all characters is poor roleplaying.