Morrowind.
Also, http://www.youtube.com/watch?v=9e5D2EAGCZM
Cut to 2:00
Seasonal Foliage: Sure, why not
Flow-Based Water Shader: Wouldn't hurt
Spears: YES PLEASE(as long as they can be thrown)
Kill Cams for Magic/Ranged Combat: forget YES
Water Arrows: Don't see much practicality except for putting out faraway torches
Assassin's Vision: Combined with Vampire's Sight, that'd be completely badass.
Guards Can Relight Dark Areas: Sure, it'd add a nice bit of realism
Paralysis Runes: Yes please
Hanging Structures/Moving Platforms: Yes please
Water Currents in Dungeons: Sure, why not
Dark Dungeons: Ooooh, thrilling. Yes please
New Follower Commands: I don't use followers anyway, doesn't matter to me
Favorites for Followers: See above
Adoption: Lol, what matron would let their children go to such a twisted demon as my character?
Build Your Own Home: Spooky house secluded deep in the pine forests of Falkreath? I think so
Skeletal Butler: Better be prepared to give me haircuts and tell me science jokes
Spell Combinations: I could live without them
Goblins: About time for goblins, I feel. Not a fantasy game without them
High Level Draugr: Overlords are enough for me
Waygates: I can see their practicality
Epic New Mounts: The demonic flaming steed they showed in the video would be badass for my assassin
Mounted Combat: Sounds awkward, but I'd give it a try
Dragon Mounts: I don't think so
Soulbug Familiar:
Well according to early modern folklore Sure, why not
Kinect Shouts: I could live without them
Screen Space Ambient Occlusion: Looks good
Enhanced Underwater Visuals: The murky depths of Skyrim's waters would look better with a little waviness.
Snow Footprints: Always thought it odd that they shouldn't be there
Verlet Surfaces for Non-Rigid Objects: All I saw was the whip, YES PLEASE
Ice and Fire Arrows: Sure
Werebear: YES PLEASE
Lycanthropy Perk Tree: YES PLEASE
Vampire Feeding: YES PLEASE
Flying Vampire Lord: Lolwut?
Vampire Imp Minions: Nah
Mudcrab Animation Tweaks: I thought they were fine
Giant Mudcrab: Holy stuff lol I don't know about this one