Absorption, Diffusion or a combination of it all?

From what I’ve read, which may or may not be accurate in all instances, is that you want absorption behind the speakers (front wall), and diffusion behind the listening chair (back wall).  Based on experience, I can vouch that the aforementioned holds true for electrostatic (dipole) speakers, but I'm not sure that it carries over so definitively for regular speakers. 

@jaytor

Yes, I tried many combinations, including nothing at all. I found that absorption (and bass traps) behind the speakers along the full length of the front wall presented a most realistic presentation: most detail and clarity with realism. Without as much absorption, the sound was more robust, but unrealistically robust, and slightly muddled. Depending on your amplifiers, etc, less absorption may be better in your system.