Well it is true its all work in progress as the game isnt anywhere near done but I would like to look at some of the other options. I was pretty negative towards him and I would love to see the options where you serve him. Curiostiy killed the cat but im to damn high on it to not explore those options too.
You need to go to PC->User->YourName->AppData->Roaming->RenPy
Save the game before choosing what you want (Serve/Kill/Protect/To be left alone...) or before the last choice of having sex with Nameless. Those are the only two unchangeble choices.
After choosing one option, if you want to explore the other option you need to delete the files inside RenPy folder and Save folders and paste in RenPy folder the old folders.
Be aware that you could loose all your progress if something goes wrong.