Resolution and Scaling
Don't forget guys like me who use 16:10 (1680:1050) 22inch screens. There are games out there that deal with none 16:9 by adding black bars...
Also I'm not sure if you mentioned this, but please have UI scale as well, or at least allow us the option to set desired scale for the UI (like borderlands 2 did). I myself have bed eyesight and as such have problems with tiny UI (font/buttons) when viewing in my native resolution.