In Oblivion your character did smile to certain NPCs and animals, or portrayed a facial gesture of despite, or an angry expression, and leaned his neck for looking directly to the body of a dead wolf if it was near enough, and the same happened in the case of any defeated bandit lying at the floor.
In this way Oblivion had a noticeably greater degree of vividness and expressiveness thanks to this feature (I don't know how to call it, "facial gestures and partly body-neck movements for reacting to NPCs and animals"), while conversely, Skyrim offers to us extremely static and inexpressive characters that don't bother to direct their gazes towards their own mounts even if they are at a foot of distance: for instance, my character isn't smiling anymore at Shadowmere, nor directs his head-gaze towards it when the horse is near. The same goes in my Skyrim for any animal or NPC, live or dead. My character is always motionless, impassible.
Thus, Skyrim portrays player characters as a sort of embodiment of robotic coldness (which was "OK for Neverwinter Nights 1" . . .) and total indifference towards the world and living beings that are surrounding them.
While this "robotic coldness" could suit -let's say- some "character concept" (a sociopath, assassin or bad*ss guy), it nevertheless looks like an odd simplification of the factual game engine: I think that this great feature what I was enjoying so much with Oblivion seems to have been forgotten by Bethesda's developers, don't bringing it to Skyrim for some reason.
And I'm wondering about that.