I put out a survey on twitter a few months ago on "What was challenging you most about ASP.NET Core"
What is challenging you most about #aspnetcore— Shayne Boyer (@spboyer) April 26, 2016
...ironically it was Documentation.
Looking over the list of issues there is a range of topics to cover. Everything from simple variable renaming to full tutorials.
Now I am asking you, the community, what do you want to have in the docs, what's most important to you?