Really, the subject line says it all. They break on me every few months and I'm amazed that nobody makes a sturdier wire to jack connector.
It's not as if I'm overly forceful or violent with headphones but after a few months the general wear and tug of being in my pockets means that the connection goes dodgy and I have to switch to a new set. I now have half a dozen pairs from £20 Sonys to B&O A8s. 5 are sitting in a drawer broken and when my current set go in another few months, I'll take the time to spend an afternoon with some wirecutters, 6 new jacks and a soldering iron.
Doesn't any company sell 'indestructable' ones? Similar to the hardbook laptops that are designed for the army and building sites?