Developers Miles Tost and Pawe Sasko from CD Projekt Red took the time to do a Tumblr Q&A on Cyberpunk 2077, which included a lot of interesting information about character creation and backstory, as well as some of the ways the world will react to your choices and backstory as you explore Night City.
Source: N4G PC Cyberpunk 2077: Boxing, power weapons, the Militech Spider Robot, and more