I've literally, in 3 different gyms, never seen ONE other guy deadlift by dropping the bar to the floor between reps. They all go to about 2" above ground then pull again. Usually with low weight. I guarantee everyone watches what im doing and thinks something along the lines of "wtf is that guy doing....you dont get the burn if you start from the floor each time." I cant believe nobody goes on the internet to learn proper form.