That's quite odd. I've heard the HD800 you had at a meet and had no issues with it and works the same way as my HD800 cable. The Denon is a completely different story since the sleeve is another material where it kinks a lot. Usually I don't have an issue with tangles since it could be the way that you coil it.
Yeah I definitely don't think it's pair-specific...I think it's just the materials of the cord. Try to flex it...it springs back. I mean it's not horrible it's just mildly annoying. Oddly I don't have issues with the Denon cables at all (Though the y-split does kink on those.)
Part of the issue here is just that the cord is longer than I need which makes it more prone to tangle....but the way I coil it apparently must be at issue. Again it's not an actual problem, just a minor nuissance compared to my Q. Or my shorter Moon Dragons. But they're a bear in their own way.
Eeew. All that bulk and heft for a 4x36awg wire cable?