Rule number 3 is the only rule I consider to be a genuine roleplaying rule. In my opinion, dead-is-dead is a play style that is separate from roleplaying. No fast travel can be roleplaying, but it is not necessarily roleplaying in every instance. And 4, enjoy the game, is something everybody should do whether they're roleplaying or not.
I look at roleplaying a little differently than most, judging from what I read. I believe that roleplaying should be about the character, not the player. It is my belief that whenever we use the word "I" ("I eat three times a day," "I sleep in an Inn whenever I'm in town," ect) we are not roleplaying. Any set of rules my characters follow should be a set of rules that are unique to that character. To me, making a list of rules that all of my characters follow is not roleplaying, it is meta-gaming.
Some of my characters have regular habits. These characters tend to eat three meals a day, bathe regularly, sleep on a schedule. Other characters are more eccentric. These characters may skip meals, baths, even sleeping, for extended periods of time. Most of my characters travel Cyrodiil exclusively on foot or by horse. I see fast travel as a form of magic, so my magic-oriented characters do fast travel (I roleplay that fast travel is a very advanced for of magic which takes much time and patience to master, so it is generally not available to those characters who are able to use it until later levels).
Nearly all of my characters wear hoods and robes (which I roleplay as being well-insulated) when traveling through the snowy northern areas of Cyrodiil and wear as little as possible when traveling through the swampy southern areas of Cyrodiil. But there are exceptions even to this. A few of my characters are less sensitive to temperature fluctuations than others. Cold temperatures don't bother some characters, warm temperatures don't bother others. Some characters are vegetarians, some aren't. Some non-vegetarian characters, furthermore, have preferences for certain types of meat, others don't. Some need to find a fire and cook their food before they will eat it, others are happy to eat food raw. Some of my characters have an aversion to anything magical; these characters do not use potions, spells, scrolls, enchanted weapons or armor (and do not enchant anything of their own), Varla Stones, Sigil Stones, Ayleid Wells, ect. Other characters characters will avoid anything mundane like physical weapons or horses. Most characters fall somewhere in between, depending on their personalities.
To add even more complexity, most of my characters tend to change over time. This means that a character who starts out do some of these things may be affected by events and begin to behave differently. A character who avoids magic in the beginning may have a change of heart and begin to use some magic at later levels; a character who avoids talking to NPCs may become more social later in the game; a character who never bathes at level 1 may fall in love or rise in the ranks of a guild and become very conscious of his appearance and start bathing regularly. A character who tries to be helpful to everyone he meets early in the game may become disillusioned and bitter by the end and kill for no reason, or will maybe just avoid interacting with NPCs; another character who begins life as a hardened killer may experience an epiphany that persuades them to try to be more helpful in the future.
In life people do not all act alike and, in my opinion, neither should the characters we roleplay. People change as they grow older and, in my opinion, so should the characters we roleplay. This means that I cannot establish a set of rules that apply to every character.