Remember how LiveJournal let you have several icons (or avatars or "pfps" as you might call them now)? And you'd carefully choose an icon to fit the subject matter, your tone, and the blog on which you were commenting or posting?
And it could make your argument look that much snarkier if you used a rude one? Or you could use it to add a multiplier to a joke?
And icons, alongside banners and wallpapers, were a whole genre of fanwork with its own design language, conventions, and norms, including carefully crediting people for them?
That was neat.