I have the latest VS 2017 (updated today). I tried a new Xamarin Forms project (Cross-Platform > Mobile App (Xamarin.Forms)) which I haven't tried out yet. Whenever I do this and Android is included the projects are created and show up in Solution Explorer but VS is unresponsive and exits after a few seconds. If I launch the newly created solution the same thing happens.
I've tried Shared Project and .NET Standard. Same results.