Long socks or ankle socks?

I’m not sure what the difference is between using one type or the other, other than the length—which do you prefer to wear? Long socks or short, ankle-length socks? Do you happen to know what the difference is between these types of socks, or why that distinction exists—assuming there’s any difference beyond just the length? Do you frequently wear long socks or short ones? Or do you wear a variety? Do you find both types comfortable, or not?