personnaly I want an open space !!
I mean: cities, ruins and cave and all rooms should be included in the world !!! no downloading screen when you enter a citie or a house !!!
I've tried the mod open cities with enhanced daedric invasion for Oblivion and it make the game really more immersive ... B)
bewolf
There shouldn't actually be city walls around every city.
Balmora, for example, had surrounding mountains. No need for walls there. There where walls around the areas with no mountains, and that's fine.
Sadrith Mora was surrounded by water. No need for walls (Wolverine Hall had walls, because Imperials like walls)
Ald-Ruhn had no mountains, or sea, or anything surrounded it. It was surrounded, instead, by man made walls. Sure, they where crumbling, but the point stays that a city won't waste money on walls when it's already protected. I loved how everyone in Morrowind used the land to thier advantage. It worked so well.
Also, about the landscape:
Cyrodiil was supposed to be a huge dense jungle, with a mega city in the middle. The change angered a lot of fans.
Morrowind was supposed to be a desolate, dead, lava filled hell hole with hardly any life. The change was fine with most fans.
The reason: A jungle would have been great for gameplay, whereas a huge dead island would have svcked. Also, we did have parts of our desolate areas. The game was improved by adding this.
My point is: Change the landscape, only if neseccary, but don't change it completey in a rubbish way. For example, assuming Skyrim is being used, one huge snowy region with nothing but snowy wastelands everywhere could svck. I'd like to see certain areas with dfferent themes. I'd like the less snowy southern areas to have swamps, forests and unique flora, like the mushrooms in Morrowind. The north of Skyrim could be pretty amazing, imo. I'd like to see something like Red mountain there. High level enemies, and powerful overlords should live there, but there should be large snowy mountains, and huge ice cliffs over the northern sea. I'd like to see huge bridge cities between Solitude and Dawnstar and winter Hold. One of these should be taken over by the main bad guy of the game, and should be his base of operations. Winter Hold, perhaps? I think it's in quite the great place for a big bad guy. The peak of Skyrim. It could be a huge icey cliff, where there's constant blizzard, and perhaps some kind of weather because of the bad guy? Snow and Thunder, perhaps?
I'd also like to see seasons come back. Again, if Skyrim, the northern area would only have less blizzards. The southern areas would change depending on the time of year. There could be changing land textures, statics appearing at different times, etc. etc.