Simon Garfield at The Atlantic:

Comic Sans has long been the “Macarena” of fonts. Type aficionados don’t like it, the way coffee connoisseurs don’t like Starbucks. It is the font everyone loves to hate. But I love to love it. More than the typeface itself, I love the idea of Comic Sans: a set of letters that can make people suddenly intrigued, and sometimes cross. No other font gets people so worked up. When was the last time you had an argument over Garamond or Calibri?