Digital painting - using one brush

I have yet to watch the video (Enliighten blog by Daarken), but I saw the basic premise of doing a digital painting with only one brush and knew I had to try it. The idea is to use a brush that you wouldn't necessarily gravitate to (i.e. not a round or chalk brush). I chose a 'cross' brush, shown in red next to the painting, next time I'll try something a bit more out there :). This was a speed paint, so only about 20 mins in Photoshop CS5. Also to note, I used the same brush setting for my eraser... actually I just changed the colour to white to remove parts that didn't work.