supering is roughly being what it sounds like Super "Man." turns out you have enough powers to be able to handle anything, countering all the other attacks or shrugging off all the hits unrealistically
I personally prefer fantasy over reality, but not by much. I've fought using drawn/cartoon girls as characters, like the theatrics of pro wrestling, and done sci fi, sword and sorcery, super heroines, goddesses etc. in fights. Main reason? Just makes things more flexible for ideas, and the fact both can stretch things a bit tends to mean more cartoonish and exagerated traits and endurance, so both fighters last longer, which means more, longer lasting fun