My opinion: Calibri is an excellent font, created by one of the leading contemporary typographers, but like every default font, it is a non-choice, too boring f

My opinion: Calibri is an excellent font, created by one of the leading contemporary typographers, but like every default font, it is a non-choice, too boring for professional applications where style is a concern, thanks to its ubiquity. Roboto is (or: has become, its beginnings were somewhat rough) a great screen font, but for printed applications, it tends to look a little dull. This has to do with ubiquity, but also with the simplicity that is inherent to most screen fonts.