Hideaki Sorachi's comment
When I was a child, I loved the cover to volume 16, but when I tried to copy it, it never came out well, so I asked my father to draw it for me on a big sheet of drawing paper and I hung it in my bedroom as a poster for the longest time.
Time has passed and Dragon Ball is now nearing its 40th anniversary. That brat was such a lousy artist and managed to get some drawing skills, but I still think I’m not quite at the level of that worn-down, yellowed-out poster.
Translation provided by Kanzenshuu