Some of the most effective criticisms I've seen of Bush have been the ones that take his shortcomings as given (rather than try to argue for them), then contrast them to what real presidents have been like. (Here's
a very good recent example.)
So I constructed the following very simple GIF animation to draw my own comparison. (By a strange coincidence, I did this late last night shortly before seeing a different [and much better] animation this morning in Fight the UnTruth's excellent diary.)
Enjoy. Feel free to spread this far and wide.