Why do people love Comic Sans?
I don't want to know why people hate Comic Sans. What I want to know is why so many people love using it?
A lot of us, including me, have an inherent aversion to it. A lot many others stop using it once they get to know of the intent behind it. But both these lots combined are still dwarfed by the large majority of the people who apparently find it the most appealing font in their palette. I wish to, for a moment, step in their shoes and see Comic Sans from their eyes.
The best that I can think of is that maybe it evokes a likeness to handwriting for other people, and hence seems more "organic".