Eric L. Barnes of Laravel-news and dotdev fame, did a little research on the most used fonts for programming.

Everyone has their ideal development setup, and many have spent countless hours customizing it to perfectly suit their needs. Outside of a color scheme, the next typical change is the font in use and every year new fonts are introduced giving us more to choose from than ever before. To find out what everyone is using, I asked on Twitter and Facebook and had a ton of responses. Based on the answers here is a list of the top 5 programming fonts in use today

https://laravel-news.com/2016/10/top-5-programming-fonts/

I'm a big fan of Fira Code myself. It has some nice ligatures and it just looks very good. Here it is in action in my IDE:

screen-shot-2016-10-21-at-23-56-34