I expected the regular "YAAAAY! 100th comic!" with balloons, partying, cake, and poney rides, but the comic was much more in the spirit of IF, with a bitter-sweet tinge to it - hell, what am I saying, it's bitter, period. It's interesting to see how the characters have evolved since the beginning, and it's clear that no matter how he's drawn, Gustav will always look creepy.
My most heartfelt congratulations on reaching #100, hope to live to see #1000 
Beauty In Diversity