My thoughts after owning the Bokeh now for a few weeks.
Stock (perforated mesh and leather pads) these are quite mid bassy. Certainly more than any of my other headphones. With the optional tuning kit you have more pads and an unperforated mesh to combine in any way you like. I did most of my pad comparisons with the perforated mesh in place. Suede pads reduce the bass and make things more mid focused. Initially I thought this would be my preferred tuning. Hybrid pads are in between with reduced bass from full leather and more than full suede. However, with all 3 I felt like there was a slight persistent veil. I did leave this burning in between listening sessions and they probably got 40 - 50 hours total burn in before I settled. The perceived veil did seem to improve with burn in but didn't entirely lift.
I then decided to try removing the mesh entirely as the mesh seems to tame the highs. For me it was like the veil was lifted! I ended up settling on the leather pads for the bass but now nicely balanced by no mesh for increased airiness. I was specifically looking for a bassier set to add to my collection so this combo with the Bokeh fits the bill nicely. I particularly like them with more electronic styles like electronica, IDM, drum & bass etc.