Which image do you find more visually appealing?
Compare between shot #1 and shot #2. In shot #1 the seagull is dead center, which is a very boring composition. However in shot #2, the seagull is placed on the left side, which gives it more interest as it gives the eyes more space for the seagull to fly into. So when you are out there shooting, try to see how repositioning your subjects can make for a dramatic difference!
Credit to the website: http://www.photo96.com/blog/?p=371