Skyrim shines in attention to details :
– broken and chopped down trees
– flying dirt
– flying wisps of snow or water off waterfalls
– the way foxes follow you with curious look
Many Oblivion mods made it to prime time :
– Birds and fish
– Companions
– Travelling adventurers, merchants…
– Weapon racks and bookshelves
– Crafting
– Windows illuminated at night
New additions :
– Random quests
– Weddings
– Dragons