Maybe my interpretation of smooth is different than others. To me smoothness is about looking unhurried and effortless. Looking almost nonchalant. The Indonesians seem to have a near monopoly on this for me. TH, SDW and Simon Santoso all have this. Recently Tommy Sugiarto has had this look about him too. Not all the Indonesians have it of course, Hendrawan was a great player but he wasn't particularly "smooth" in my mind. Ardy Wiranata was great too but his movement seemed almost laborious. Outside of the Indonesians maybe Chen Long, Hu Yun, Han Jian and Chen Hong come to mind. Muhammed Hafiz Hashim should be there too.The blazing fast ones are impressive, but not so effortless. LCW, Du Pengyu and Tien Minh Nguyen all seem this way to me. Lin Dan strikes me as not really in either camp as would most players. Xia Xuanze and Zhao Jianhua had great court coverage but seemed neither especially smooth nor blazing fast.