I would like it. I really enjoyed this aspect of Fable and FO3. As others have mentioned, though, that leaves the issue of BGS telling us our characters' back stories rather than letting us dream them up ourselves which is pretty integral to role playing - something I'm sure BGS want to preserve.
How about an optional sequence? Or origin stories like in DA:O? I loved that about DA:O. The origin stories were probably the highlight of the game for me because they fleshed out my character the way I chose.
Of course I would rather that Skyrim's origin stories were significantly shorter (probably a series of flashbacks rather than DA:O's long tutorial sequences) so that they could be more diverse. How about they're a compilation of choices you make at character creation in a way similar to Mount and Blade? Except replacing the text M&B gives you with short gameplay sequences.
For those who don't know, M&B lets you choose your
- Father's living
- How you spent your childhood (I would see this broadened out massively in TES compared to the options in M&B...)
- How you spent your early advlthood (again, more choice)
- Motivation for adventure
I would also like to see different spins on these per race and homeland. A "how you got to Skyrim" sequence would be cool as well.
This is how I would see childhood tutorials done in TES if they were definitely being implemented. If the decision rested with me, though, I'd rather they put all that diversity and effort into the ending of the game rather than the beginning.
Edit: but I still think that we should come back to the present in prison, whether we were imprisoned wrongly, are prisoners of war or are just thieves would be pretty clear from the background story you chose.