Ha ha ha. It's a deliberate decision and its my very humble hat-tip to one of my heroes, Simon Peyton Jones.
"This is a very funny question, why I use Comic Sans. So. All my talks use Comic Sans, and I frequently see little remarks, “Simon Peyton Jones, great talk about Haskell, but why did he use Comic Sans?” But nobody’s ever been able to tell me what’s wrong with it. I think it’s a nice, legible font, I like it. So until someone explains to me — I understand that it’s meant to be naff, but I don't care about naff stuff, it’s meant to be able to read it. So if you’ve got some rational reasons why I should not, then I’ll listen to them. But just being unfashionable, I don’t care."
Funny, I was so sure it was the default font in Word back when I went to school. But I can't find any references to it so I don't know where I got that idea from.
It was very very popular. I think all the flak it receives now is because of its pervasive usage in the past. We all overreacted and over corrected. It is definitely a very legible font with a lot of accessibility and warmth.
