I've got a couple of pairs of Howard Leight noise canceling headsets which have an audio port so I can directly plug into pretty much any of my radios. The mic is a separate cable. I do have a headset for kenwood radios, but it's one of the one ear tactical headsets, and I use a foam plug in the open ear. The nice thing about the Howard Leight headset is it can amplify sounds too, and then provide protection when I'm shooting, and it's got good battery life too. I've got a pair of David Clark headphones too that I use when flying, but the price of an adapter for my other radios would be prohibitive.
The guys at work use either Peltors or David Clarks when working around helicopters, but they're not paying for the headsets themselves.