I've played just Oblivion, very good game but was boring after few days. I hope Skyrim won't be like that and gives much better gameplay time.
I think that's a personal preference of your own, whilst Oblivion wasn't as good as Morrowind, it had a fuck ton of playtime, you just chose not to use it because you got bored of whatever you were doing. The Elder Scrolls games are insanely moddable, I wasn't a huge fan of Oblivion but once decent mods came out, I got some and my game experience improved ten fold.
I also think it's safe to assume that Skyrim is going to be better than Oblivion, but it's going to be the same type of game with similiar features, so maybe you will not like it.
Yeah, I already played CoP, and I liked it somewhat, but I prefer Fantasy/Medieval Settings 
I hope there will be Mods for Skyrim with such things aswell.I really really do.
There is no Ultimate Freedom like it´s always avertised as long as there is one fix story Strain to follow.
Or Maybe Bethesda will implement a mode like in Fallout where the weight system is more realistic and you need to eat and sleep.That would be nice already, but Warm clothes or you die of cold is a good Idea too.
Erm what, you were never forced to follow the storyline in Elder Scrolls games, there were a ton of other things to do, you never had to play the main quest if you didn't want to, but you can't expect them not to include a main story because people do like to do them. Plus as I mentioned before, the Elder Scrolls games have always been hugely moddable, there are a ton of mods for Morrowind and Oblivion that tottally change the game, including mods that make it so you must eat, drink, sleep etc and they are usually made very soon after game release.
