Finally, Realistic Needs and Diseases adds hunger, thirst, sleep, inebriation and progressive diseases to Skyrim.What may on the surface be a small change is huge in terms of immersion
The gates will also be open during the day and you can just walk (or ride) straight in.
You can cook their meat and a number of new alchemical ingredients are available. You can now loot animals in a variety of ways including dressing, skinning, harvesting, and butchering. When it is snowing, snow will build up on your body and NPCs will even wear snow shoes! You can even see their breath when it is cold. It seamlessly tracks your condition and shows you your wetness, temperature and exposure on screen.