About a year ago I began learning css and began styling my sites with it. I now build 100% css only sites. There’s so much more you can do with css than with plain html. For a big site like Adult Everything going the css route was a must. In the future I might even do different themes (site colors) for holidays. Green for St. Patricks day, pink for valentines day or red and green for christmas. Not only that but once you get your basic design set up, you can always change font sizes and colors, even header graphics by just editing 1 file. No more opening all files at once, search and replace, save them all and then upload them all again.