I love taking photos during the blue hours. Landscape photographers often focus on the golden hours and while I love those, I love the blue hours just as much; if not more. The blue hours often bring landscape photography to an almost magical level because the colours can make for an amazing visual display.
While the golden hours can be quite dramatic as the day transitions the blue hours can be much more subtle with brilliant displays of blue and magenta across the skies. I find the blue hours very tranquil and love the peace while taking photos as the world is settling for the night, or thinking about stirring for the day.