I ordered Focus pads along with the HE-6 to compare with the stock pads and found them fine overall except for one big problem: the padding "ring" is wider than the stock pads', so the inner "hole" diameter is much smaller. That made enough size difference that my ears no longer fully fit inside, and made parts of the "ring" press against my ear uncomfortably. I went back to the stock pads after about 20 minutes.
I admit that I've only heard the HD 800s on three amps — Bottlehead Crack, EF-6, and Asgard 2 — so I may not be giving them a fair chance yet. If I'd only heard the HE-6 on an amp that wasn't ideal for them (like the vast majority of all headphone amps), I wouldn't have a fair opinion of them, either. But I have to wonder why so many people, including people with very nice amps, make similar complaints as mine about the HD 800.
It's still an amazing headphone — just not my taste. I had almost the same opinion of the widely loved HD 650: recognition that it's good, but I don't like it.