KBM. As I played on a keyboard and mouse since so long, I lost the usage of controllers. And whenever I have to use controlers, it's a bit of a pain. So I don't, as much as possible.

Tho in some games I tried, like elite dangerous, I had to use a controler for movement as on keyboard it was painfully slow, or too fast, but also just to be able to use most of the controls.