I’ve been watching plenty of instructional watercolour videos lately. Some of the best were artists who dove in with their brushes without doing a drawing first. Their results were paintings that were very loose. They captured their subjects with bold confident strokes.
The attached samples are my quick studies of what I observed. Another key feature is the use of wet on wet. If you’re trying to loosen up your watercolours limit yourselves to big brushes only. This will force you to keep it simple. If you’re willing to take a shot at the technique – hide the pencils and tiny brushes. You’ll be surprised with the results.