I would like to see traps not just in dungeons, but in the homes of NPCs and in the wilderness itself. For example:
Some sort of thief traps (doors that scream when lock-picked, rugs that would trap a trespasser until the trespasser has been discovered and guards arrive to arrest him/her)
Animal traps (pitfalls, bear traps, snares, deadfalls)
I also support magical traps. These traps wouldn't be so deadly as they would be puzzles to confound and delay a player. Think of Inception with the staircase trick.
That staircase was drawn by M.C. Escher and it is a 3D impossibility, although I'm not sure how they did it in the movie, but perhaps they fiddled with the perspective to get it to look like that. But something like that could not be rendered in an actual game. His artwork is amazing, though. He draws 3-dimensional impossibilites by manipulating 2-D perspective.
Do you think NPC homes should have traps on the locks or windows or something?
Oblivion had the quantity of environmental traps right, however there wasn't enough variety. Once you've seen the first one of each type, you knew exactly what to look for to avoid future examples of the trap (IE, a pool of blood on the floor for the spike ceiling trap, grates or nozzles for poison gas, holes in the wall for darts, etc). I want to see more variety in Skyrim.
Also, bring back trapped locks please. Make Security worth leveling again.
You mean like the trapped locks in Morrowind?