Conversations with NPCs in Oblivion became more annoying over time. The zoom-in to their ugly mugs, the diplomacy wheel, and the limited voices all played a part in this. I've read that you'll no longer zoom in on them when conversing in Skyrim, which helps eliminate that pause when starting a conversation... and also helps if they are ugly. I'm sure character faces will be much more appealing in Skyrim, where a beard doesn't look like you just huffed paint.
While I understand that the conversations between NPCs weren't exactly informative or entertaining, I did appreciate that NPCs actually acknowledged each other. In many games you're the only one NPCs usually seem to notice outside of major story scripted events. But with that said, it would be nice to hear more interesting -- or at least more varied -- banter.
As for moving things around that weren't yours, I thought NPCs told you not to do that, but I'm not sure if they did more than that. Its been a while since I played. I do like the idea of NPCs cleaning up after you, even if it is just a reset after you leave the shop and come back later. They don't have to do it in front of you, but that would be cool too.
Also, it's rude for someone to run up the stairs into someone's bedroom and snoop around. Sure, the NPC would follow you but wouldn't say anything. It would be nice if the NPC would ask you to return to the store level or just leave. It's odd that they don't care where you go in their house as long as they've got an eye on you. And if you were out of sight for a bit, they don't seem to care. "What were you doing in my cellar?" would be a good question to ask, especially if the door was previously locked. All minor complaints though, just like the article.