I don't know what this style is called, but I like to call it the "y2k aesthetic". Basically, post wallpapers that look like they belong on a Windows XP machine, or an iMac G4. The more kitsch, the better! And the wallpapers don't have to actually be from the 2000s, they just have to look like it, in other words, wallpapers of modern anime are allowed, as long as they look the part.