Google Drive is great for functionality, but I want beautiful documents that are easy on the eyes. To do that you need to install additional fonts into Google Docs from the Fonts Menu. There are over 450 fonts to choose from, but these are the best new fonts in Google Web Fonts:
Fredericka the Great
Love Ya Like a Sister
Mountains of Christmas
Adding these 10 fonts to the basic preinstalled fonts will help you develop attractive and creative documents quickly.
Currently you cannot add new fonts to Google Spreadsheets (or Google Sheets, or whatever they are calling it this week). I'm sure that will change in the near future and it will work similarly.
Quick video of how to add the new fonts to Google Docs: