When I was playing Morrowind, the options you had on storing your possessions basically were perfect. You would not have any limitations on doing so, you could sleep in any bed (if i remember right), could store everything you had in any place there existed, even if not in a chest or something like that, your items would still appear hours later in the same place you left them.
This opened a variety of possibilities, when arriving at a new place you would like to stay in. For example: You would arrive at Vivec and there you could just go to the first house there was, kill the inhabitant, get rid of the corpse (somehow) and call that home yours with no limitations.
In Oblivion, and I still do not know why Bethesda did it in the first place, such freedom was not given anymore. You would have to settle for pre-build PC-Houses you could buy. Killing an NPC for their home would result in desperation, because you couldn't sleep in NPC owned beds, you couldn't store items in NPC owned chests, etc... which was really frustrating me, since a big part of immersion/roleplaying was taken away from the player.
I couldn't find any Info on how this is going to be handled in Skyrim, so I thought on sharing my concern with you guys.