Credits go to @kmh for creating this style. It comes in both a light and dark version (check the links for usage instructions).
If you don’t want to fiddle with code and stuff, loma.ml has already installed it server-wide, and should be available straight away for new accounts (If not, go to Settings>Display>General Theme Settings and change it from there. Or follow the guide in any of the links above).
Google+ was better. The concept of “circles” being the primary way of interacting with people was ingenious and far better represents how real people interact. My fencing friends are not the same as my RPG friends who are not the same as my family.
Facebook adopted this with “lists”, but they’re not treated as the core part of the experience that G+'s Circles were, so they don’t get used.