We are all built differently, have different nerve firing sequences.
In other words, whichever works best for you.
Some say a Tanner/Goran is best. Some say a Graf/Stich is best.
Can't really follow examples like Querry, Isner, Milos, Dr.Ivo, Janovich because they are tall and can pummel any motion with equal speed.
That's why there are so many different techniques that work.