QGIS » QGIS Application

I'd like to see vertex markers, if snapping is set to pixels, be a radius of the number of pixels generally set or set for the layer being edited; and if snapping is by scale distance, be a minimum of three pixels wide, and as a maximum, the radius of the distance set for snapping. So, if you're zoomed wide, the markers would be wide spots on the lines, and if you're zoomed in close, particularly with vertices close together, you could pick a spot where only the vertex you want to affect will be selected.

It would also be nice if the circle could change color when the mouse is within it, so you can tell that snapping is active, working, and your next click will snap to the vertex you want to snap to, and not just where the mouse click occurs, or the wrong vertex.