I went through several cameras over the time. But for the most part I used the Canon 5DmkII, which delivers a great quality footage, but is not as easy to handle as most film/video cameras. It helps if you use a small rig and followfocus for ease of use.
Sometimes I put the camera on a tripod and rode through the frame, sometimes I just gave it to a stranger (who could potentially run less fast as me) and asked to just operate it. Good fun:)