I notice most drummers keep constant time with the left foot on the hats, when thay arnn't playing the hats with sticks. I never learned to do this. how important is it ? I always keep time with eithert my right hand, wheather it's playing hats or ride cymble, ot what ever, I don't have an issue with loosing time, but it seems like every time I watch a drummer, that left foot is constantly in motion " clapping tha hi hats. opinioins on this please ?