Being told after the Civil War quests to clear out any opposing you camps you come across only to find out you can't because every one has an immortal NPC. Stupidest thing ever.
In fact immortal NPCs are simply the stupidest thing ever.
Agreed. I decided to do this of s and g only to find out I could kill all but the person in charge of the camp. IMO once the quest is complete any NPC(s) that were involved are no longer important and can be killed.
Back on topic....
*You murder someone in total secret and the friend/relative of that person now hates you even though they have no knowledge or proof you actually did it.
*Fletcher merchants sell high amounts of low level arrows when your high level but the high level arrows you need are either in small quantities or non-existent.
*Every little girl and boy in Skyrim looks exactly alike even though they all have different parents.
*Vampires can now walk in the sunlight and not become a pile of ash (could be a bug).
*Slaughterfish can attack you underwater but you cannot attack back.
*Noble hats in Skyrim look like Santa Clause Hats.
*You have the ability to chop wood and harvest ore but not the ability to make your own arrows.
*No matter if your an old looking hag or a hot woman, while you will not have the same face, you'll have the same body and no sagging ;P
*No forge or nice garden comes with the highest price house.
*You can slay a mammoth and get a single tusk off their corpse even though they have two, same goes with Saber cats, you get one eyeball even though they have two.
*Mammoths do not drop meat (trunk don't count) and fur but other animals do.
All I can think of off the top of my head right now.