i get a black spot in the corner of my eye (mostly in the shower). it like a face of a kid. sometimes i turn around and nothing is there. then the black spot goes again.

Auras vary from person to person , depending on the type of seizure,even associacted with headaches , as a person enters an altered state their body percives things differntly, I usally think my voice has dissappered and my vision becomes blurred and spotted

I don't know about how common, but I've experienced that before.

I don’t experience auras , but I have a friend who may not see things , but hears like electric guitars 🎸 playing in his head

I haven't ever seen anything strange pre-seizure, but I have experienced auras.