As an epileptic I can say that those shown in the first post are certainly more like those in which I experience. I have never seen anything like the twirling rainbow, and as for the black and white sort of cubic ones... If I have a strong seizure (such as an induced seizure, brought uon by strobe light), the sort of repetitive cubic-ness can pervade my very being and soul and turn all that is, including my thoughts in pulsing, spiraling cubes as I twitch and froth. Haha, I think its really really neat when I can remember it (often I just blank out). My fiancee, unfortunately, who lives with me, has taken away my strobe light and thinks it is "wrong" to induce seizures to study them from a unique vantage point.
There was a period in my life where I would take LSD and stare at the reflection of a strobe light in a CD (something about how it reflects light back that makes the seizures much stronger) simply for the experience, to try and understand it. Truly bizarre. I have since grown up and developped a little common sense. Haha. Yeah, I'm THAT intense