Not enough variety.
Well, many of the voices sounded a bit too similar, but some of them were pretty good. The female voices were pretty abysmal though...
I would have liked a bit of variety. Instead of just various American voices, you could have tried different accents.
The content, in terms of the humour, was a bit disappointing..The only decent one was "12 educational reasons not to put glass in your eye". The rest seemed like pretty poor attempts at being funny.
There are loads of demos like this, where there are just loads of voices, completely unrelated. Try to combine them in some way, maybe by putting them in some story.
The sound levels differed quite a lot in the different parts. I found myself turning up the sound to hear it at the start, and then quickly turning it down again.
[Review Request Club]