I have been using Brackets for my past few projects and i really like it. It feels light-weight, fast and it has some awesome add-ons.
The thing that i like the most must be the Live Preview.
I have two screens, so on one screen i put my code, on the other one i put the live preview window. When i change something in the code it changes live.
It also has add-ons like W3 Validator, and stuff to beautify HTML, CSS and JavaScript and waaay more stuff.
It is also open-source, and so are the add-ons. I really like that.
None of my friends use Brackets, they use stuff like VIM (i tried it and i really don't like it) or like DreamWeaver...
So watcha think? I really like it but maybe there are some better editors out there.