Shoes and seating position are also factors. Try engaging the clutch with heavy work boots and you'll know what I mean. If you're starting out, stick to gym shoes or dress shoes. A rock solid sole will prevent you from getting that "feel" of the catch point.
Seating position will vary from driver to driver but you don't wanna be so far away that you have to extend your leg completely to disengage the clutch. Unfortunately, this prevents gangsta lean.