When the best art comes? Hard to say. Sometimes the concept is necessary, sometimes it's better to give a flow and set yourself free and just follow the mood. This is a very old piece of mine. I even don't remember if it exists on paper or was thrown away. I love ink and it was one of those rare moments when I just allowed myself to follow the mood and came up with some result.
I wish myself and everyone else to feel more freedom and always find time for spontaneous creativity. I have heard that it makes our life a little bit longer and happier. :)