You know, of all the characters to have hallucinated Azumanga Daioh, I would have pegged Sakaki as the most likely.
I mean think about it, she's smart, athletic, beautiful, busty, everyone wants to be her friend, even the girls (and I don't just mean Kaorin), and despite her social awkardness she still makes tons of friends and gets basically everything she wants.
Meanwhile the real Sakaki is... well, I prefer not to think about it...