I never thought that working in browser can be more fun than Eclipse IDE. But my thinking is changing these days, first http://jsfiddle.net/ became my favorite playground for any HTML/Javascript research and now I felt Developer Console is way more convenient and faster to work as compared to Eclipse, reasons:

1. No need to checkout project and wait for metadata download to start.

2. No need to update/sync the project, you are always working on latest copy.

3. Save is pretty fast too, and thankfully “CTRL + S” works here also.

4. Developer console remembers the last opened files, when launched again.

Read More: https://abhinav.fyi/force-com-developer-console-navigation-trick/