My favorite genre of self-portrait is cartoonists being bothered by their characters while trying to draw
Bill Watterson – Calvin and Hobbes (1986)
Hergé – Tintin (1947, Tintin Magazine)
Jeff Smith – Bone (1993, Bone Holiday Special)
Walt Kelly – Pogo (1950, Maclean's Magazine)
And a bonus:
Berkeley Breathed – Bloom County
for the reverse, take this image of Tove Jansson about to murder the moomin characters

























