I posterized the one on the left. I also made it black and white then I proceeded to color in my shirt. The next one I brightened the image and messed with the hue and saturation (Reds). it is my favorite  The next one I chose to mess with the hue, sharpness, colors, and details to bring out the different styles used on the cover of the games and books. The next one, I cut out the background this is my least favorite. The last one I I brought up the red and made the blacks darker.