What weird and wacky races lie in a far future without humans? And what do all these totally not scientifically sound races have in common? Well they all obsessively worship whatever entertainment the Culturate put out, not knowing all of it is secretly stolen from the now extinct humans, played by vaguely human-like alien actors with various shades of blue or green skin and maybe a few antennas.
But it's a shame humans never will never see what they've created. Aliens civilizations that idolize and worship the paragons of humanity with an almost religious zealotry, or at least the ones on the internet. Well actually, mostly all of it is just memes and entire alien races are genetically bred or augmented to become perfect embodiment of memes.
And due to the sheer amount of aliens that exist in an unfathomably large universe, every aspect of internet, works no matter how obscure or hidden has nations and planets dedicated to it's very existence. All the wonders and horrors of the internet given physical form and life through these vaguely human looking aliens.
Who knows, maybe something you've written already has been given life in this universe.