Sunsets always make for some gorgeous photography, but when you want to do something different, try taking photos of people in front of the sunset. Expose properly for the sunset so you still get those beautiful hues, and you’ll see that the people in the photo will turn into silhouettes, making them an intriguing subject within your photo.
In this photo, I captured a boy playing on the docks, as the sun set behind him. His motion of raising the arm in the air makes it obvious that he is in action and not just staying still. I believe this enhances the photo with more interest and motion.
When you do this though, just make sure that the silhouette created is identifiable and not just a big black blob in your photo.