This is
so epic.

I loved your character creation guide, and I love this even more.
I now
really want to make a character that looks like M'aiq, Brynjolf, Lisette, Karliah, and more.
I know. I'm pretty much an enabler for people who suffer from restartitis.

I'm working on a longer, more detailed character creation guide, too, but it probably won't be done for a while.
Interesting stuff... on the PC you could play a doppleganger, assuming the form of someone after you kill them.
I've actually thought about some of the unusual scenarios that could be played out but haven't really gone into any depth with them. RP'ing the whole 'twin' angle, assuming another person's identity, just flat-out
being that other person (ie. removing them from the game and redesigning all of their quest-related events around the player), etc. It's also trivial to convert the NPC plugins to companion mods, which opens up other interesting possibilities.