KituneChan
Buffy chose the delusion. She is in fact strapped to the bed, drooling on herself, because she chose the fantasy. Think about it. Her options were choose the "real" world, where she's a scared little girl in an insane asylum, with no friends, pumped full of meds and strapped to her bed at night. In the "fantasy" she's a hero, The Slayer, The Chosen One. Sure, it means that some whack stuff happens...correction,
lots of whack stuff happens, she loses friends and loved ones, and life is really hard. But she can literally change the world. Her friends are loyal and powerful, and together they can stand toe-to-toe with gods (or a goddess, at least).
Now if you had to choose...the hospital gown and the pills or the leather jackets and the steaks, which would you choose?
That last part brings up a whole other world of possibilites (and not the shrimp world either - where /did/ they come up with that anyway?). I really wonder if it was all in her head, why she would continue with the delusion where the man (er... vampire) she loves has left her, her father wants nothing to do with her, her mother is dead, she is saddled with the burden of protecting the world - etc. Yes, she can change the world, but if it is a delusion, why put things in it that would make your 'fantasy' life more difficult?
It really makes me begin to wonder on just what delusional people are really thinking. I'm curious to see if there is some sort of study, or medical/psychological journal on it somewhere.