I like using IEMs while walking, making cable microphonic characteristics critical to my enjoyment of an IEM. I wear glasses, so any behind ear cable that isn't the most supple generates scads of microphonic noise. Memory wire cables accentuate microphonics when glasses are worn, with some worse than others. I clip the memory wires under my glass temples to reduce clacking, but it's an imperfect solution. Cables that work great for me are the non-memory twisted wire Westones and EarSonics. Also, low modulus insulator cables such as those on the UE700 and X10s (X10s worse than UE700). My IE8 cables are okay, though the texturing on the cable relief generates tons of wind turbulence while outside. The Shure e500 and SE530 cables, though non-memory wire, were are the limit of what I consider acceptable from microphonics. The Shure SE215s with memory wire are beyond that limit. The stock SE846 cables are so microphonic during movement that there's just no point using them unless it's for a sit down session. Oddly, the Triple.Fi 10 memory wire cables work okay.
The worst ever cables were the Klipsch C3s.
I wish each IEM offered a twisted wire no memory wire option, especially those with removable cables. Needless to say, I'll be getting a non-memory wire cable for my SE846 soon.