I was reading today someone's comment that photography on a fine day, always looks better when there are clouds present. The commentator's thoughts were that if there were no clouds, the photo can look bland. However throw some clouds into the mix (and I am not talking photoshop) and it can add extra dimensions to a photo.
When walking today, the article that I read immediately came to mind. Clouds can add to a photo with their different formations and substance, and then within you spot that wonderful, wonderful blue.