Join Date: Dec 2010
Location: southern Arizona
The stirrup leathers should be vertical. If they are not, your feet are in the wrong position for the saddle and will wobble. Your rump should be in the deepest part of the saddle. If not, you are fighting gravity. In most jump saddles, that puts your heels slightly forward of the hip, if the saddle fits you.
And barefoot in stirrups would scare the daylights out of me! However, the ball of the foot should be on the stirrup bar. I prefer the forward edge, some prefer the rear edge, but it shouldn't be the toes.