With the launch of WatchOS 2, Apple Watch gained the ability to include user-selected wallpapers on select watch faces. Either a photo album will rotate through wallpapers each time the watch lights up or a single photo may be chosen.
This customization gives you more possibilities and matching device wallpapers can create a nice effect. Thanks to @AR72014, this Wallpaper of the Week post includes optimized Apple Watch wallpapers from previous versions of iOS. Take a step past the fold to find your favorites, both new and old.