I roleplay some but I'm not strict about it. I try to use my imagination about being in the story and it enhances the fun. If there's a storm, she keeps right on going though...she fights dragons, after all. She's so busy, she forgets to eat and sleep but then she'll catch up on some down-time from saving the world...have a meal and a bath, that kind of thing.

^This.
Each of my characters have their specific ways about them, and quirks, rituals, requirements, etc.. Overall I agree though that Roleplaying in Skyrim is more a function of the player than the game. I eat and sleep as I feel compelled to more than out of necessity, so I don't follow a strict feeding schedule. I'll sleep whenever I come across a tavern after a long adventure.
- All of my characters carry a Miscellaneous item or Ingredient that is of personal significance to them.
- Maylissa, my Imperial Cleric, is a devout worshipper of Arkay, and prays daily. I've yet to travel to a Shrine of Arkay, but once I do, she'll return regularly to worship and leave an offering. (She's a new character.)
- Conan does not use magic. Ever. When he faces mobs or dungeon bosses, I play the Conan theme from a portable USB drive. And. It. Is. EPIC.
- Gi'Anna, my Khajiit Warrior, will always buy something from the Khajiit caravans to support them. A few times she left miscellaneous items and weapons in their tents as "donations".
- Arkved, my Altmer Mage, collects the robes of every Necromancer and Mage he vanquishes, as well as every Enchanted Robe he comes across.
And the list goes on. So I RP each character in ways that suit the personality and history that I've created for them, rather than strictly adhere to fixed eating and sleeping schedules. And for the record, I find nothing wrong with those schedules for the people that play that way. =D
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