I was getting bored with the same font in my EditPlus editor which I use daily for developement purposes. EditPlus is very good, simple, has syntax highlighting, etc. I wanted to try some different font tried the usual monospaced fonts Fixedsys, Courier, etc. but wasn't quite satisfied with them. After some 'googling' I found a post by Keith Devens listing a good no. of fonts that are suitable for programming, some are even designed for the programming community. Some are free, while a few cost money. Keith has very well explained the need for a specific font for programming and I totally agree with him.
I liked Monaco, installed it, and I'm lovin' it ;-)
Here's a screenshot of my code using that font.