Excellent stuff. I actually first came to Strolen's Citadel many years ago looking for something like this.
I particularly like 19. I am thinking of using it in the following way: make your PCs design their characters in gory detail, give them praise for good backgrounds, make them feel proud, then, at the beginning of your session ask them each what their single favourite moment in their character background is. Then take their character sheets away and make them play "blind" (no running knowledge of their stats) with only one thing to hold onto: they can remember that one moment of their character's background. At the end of the adventure, perhaps they find where the evil wizard has stored their personalities...
The Wasp's Nest
The thick heat of the afternoon drips sweatily through the rhodedendron branches and you are soothed by the monotone buzz of a million insects. When you finally emerge from the tangle of bushes, damp and scratched, you find yourselves in a curious grotto of rocks and decide to stop and rest. Sitting in the shade of a sizeable rock, it is several minutes before you realise that the monotone buzz has distinctly changed its nature. It's getting louder. A shadow passes over the sun. A flickery shadow, as if of beating wings. Into your mind leap unbidden images of furry, scaly, many-eyed, segmented creatures. Perhaps you should take cover.
There are many possible hiding places in this grotto. In a crevice, in amongst the rhodedendrons, in a hollow fallen tree trunk. Wherever the PCs decide to hide is where the giant wasp goes next (to its nest or to the flowers it loves to feed upon). Particularly unfortunate would be the encreviced PC who crawls further and further back, only to put his hand into a wriggling mass of giant wasp larvae.