Calibri has been behaving badly, tell us presentation specialists at Slidebean: 'Calibri is one of the ugliest fonts ever invented by mankind, I hold it up there with other design fails such the infamous Comic Sans MS'.
Ouch. After reading an introduction like this the only fonts I want to use now are by all means only Comic Sans and Calibri! I'm even ready to forget my beloved Arial and Times New Roman for a while. (:
Image source: http://www.myfonts.com/fonts/ascender/calibri/