It is always great to revisit this archive. Here are two of my favorites:
http://www.cs.utexas.edu/users/EWD/transcriptions/EWD11xx/EW...
http://www.cs.utexas.edu/~EWD/transcriptions/EWD13xx/EWD1305...
http://www.cs.utexas.edu/users/EWD/transcriptions/EWD11xx/EW...
Perhaps others might also post their favorites here ?