Warning, this particular post may seem nitpicky or unnecessary. However, I strongly believe that presentation matter and Calibri is not a font that puts the best professional foot forward. So with that…..
Fonts matter in what you do. It’s amazing how many documents I come across that are Calibri size 11 font. Every single one I read with an interpretation that it was simply thrown together with no editing and thought. Is it as bad as Comic Sans or Papyrus? No, but it feels like it gets closer every year.
By default, I use Arial size 10. It’s a classic, vanilla standard that works in almost all cases. Why do I care? Because a document’s appearance goes into how that document is perceived by readers. There’s a reason that Amazon took time to develop their own font for the Nook. There’s a reason that Google has an entire site dedicated to web fonts.
The little things matter almost as much as the big things. Taking a few seconds or minutes to think about your font takes almost no real time but can change the overall perception of the work.