It's fast and robust. Extremely lightweight and is a sufficient text editor.

Flexibility and customisation ability and at the same time not so keyboard-intensive as other text editors. You can automate repetitive editing tasks, even have Vim generate skeleton files for specific file types. Very good documentation and community size. Present in most Linux distributions by default. I especially enjoy Vim because it's console oriented, since I like/am used to work mostly on the command line. No need for mouse usage!

All common editing functions are on your fingertips. It supports macros (map keystrokes) which automate part of your trivial job. You can write pseudo code and modify your target text automatically. The keystrokes can be written in a text file and finally allows you to edit your target text without opening it. It can store up to 10 delete buffers and up to 26 named buffers that you can easily use even through macros. You can easily create your own syntax files and see your special text files in color. Supports X-windows interface (vim -g). Easily it captures and imports the screen output of the OS commands inside your text document.