What are important features in a listening chair

My mother works for Knoll so I am lucky enough to have both a Barcelona chair as well as a Womb chair. I prefer the Womb because of the way the fabric catches the reflections around my head. The Barcelona is no slouch either, but nothing beats the comfort that the Womb offers.

I would say that comfort would be THE most important aspect for a chair you plan on spending hours in. Also consider the way the fabric interacts with the imaging and reflections. 

@dweller - I have not seen this one, that is one special looking chair there! Haha