Well, for someone that uses VIM/Emacs heavily, Eclipse might be fine as an IDE, but I don't like to use it as an editor. When I'm using eclipse to edit code, I feel like I'm using microsoft word -- user friendly, but not "coder" friendly.

Also, try using eclipse on very large projects -- it gets very slow. Sometimes I'm not sure if eclipse is hung, or if it's still stuck compiling something or fetching something in maven.