This is my latest sketchbook page, done quickly in a bit of quiet time. I was so disappointed that I didn't have my trusty ballpoint pen with me but I had a felt-tip. There are things about the felt-tip pen that make it trickier than a ballpoint though. You can't make really light lines to lay out your idea; every line is dark. And felt-tip blobs a little bit and you tend to get little ink spots on your hand if you rest it on the drawing before the ink is dry. You can't really get a feel of shading as well with a felt-tip either. All that being said, it was still fun to sketch with and perfection isn't an option because, like the ballpoint, there's no erasing!