D&D 5E (2014) New WotC player survey, sort of.

[payn]

I can confirm Planescape and Dark Sun have at least two votes!

Birthright is covered too.

 

[Paul Farquhar]

Birthright is covered too.

But covered in what? is the important question.

 

[deganawida]

But covered in what? is the important question.

Tighmaevril, of course