>>1813Space Engine is something of a space simulator? However it technically doesn't have any goals or gameplay, for the most part its zooming around the universe which is mostly procedural generated (it does also contain several catalogs of real stars/planets/galaxies), and so you could go fly out of the Milky Way Galaxy, pick another galaxy, fly to it, and fly to a planet there. Its decent at its procedural generation but doesn't lend itself to having gameplay elements so its not going to be for anyone. It...may also induce anxiety at times.
myimoutobooru is a decent stepping point to at least learn what a LAMP/LEMP stack is, and at least know how to use XAMPP and similar. That whole thing with server and website management I can't imagine would be fun for most people, but who knows maybe it is :^)
Oh there are people that believe the Earth is flat, and I'm sure a fair few gather on that site, but I imagine people arguing for the sake of arguing also go there. It doesn't stop there though, there are other sites devoted to nothing more than absolute nut-brained conspiracy theorists such as cluesforum (which I have bookmarked for some reason). Don't visit it, I guarantee it won't be a healthy experience.
/con/ predates Hiro as far as I know, but Hiro was a bit crazy with the new boards for a while. I suppose he had his own idea for new boards he thought might work.
It really seems like the same crayon-esque style but I am pretty sure its at the very least the same poster who drew all the 2hu bellyrub images.