If you are going to use a preloader in your next site then why not make it worth watching. Here are some great examples found at CodePen to get your creative juices spinning.
Pure CSS Loaders Kit by Viduthalai Mani
Pure CSS 12 Loaders by Tania LD
SVG Loading Icons by Aurer
CSS3 Loaders by Siddharth Parmar
CSS Circular Loader by Fabrizio Bianchi
CSS Spring Loader by Fabrizio Bianchi