One of the things I find very bland about the Safari web browser for the iOS platform is how all of the bookmarks show the same icon. Not only does this look repetitive and fatiguing for the eyes, but it isn't as friendly to interact with.
Most modern desktop web browsers show the actual website icon when you bookmark a web page, and the mobile Safari web browser should be no different. If you're jailbroken, you can install a new jailbreak tweak called BookmarksIcons to accomplish this.