Oh dear, you ask me... And I doubt I can answer. I am not a frequent Photoshop user, since I do not own Photoshop yet, I just get to use it at school's computers now and then. But I think it was the basic one you always start out with. I had the "Shape Dynamics" (in the brushes menu) switched on, to get the strokes thin in the edges.
Hey i was wondering what brush you used in photoshop on the drawings you did in your sketchbook on post #182.