The Evolution of Blenders User Interface [PDF] http://download.blender.org/documentation/bc2008/evolution_o...
Oh thank god. I want to tear my hair out whenever I use Blender just to view or convert a file. The file browser is nearly unusable.
Many kudos are in order.
Blender is generally feature rich, but has a fairly different UI than other products. People vary on whether or not they find that a good thing, Blender was originally built in an animation studio, for the most part, the interface prioritized ease of use for the knowledgeable user over ease of use for the new user whenever there was a conflict and sometimes neglected the latter altogether.
The project has since put in a lot of work to try and make the interface a bit easier to pick up without compromising on the speed with which current artists who use Blender heavily rely on. The 2.5 series of releases is the latest attempt at making this better.
I find it quite annoying when people complain about Blender's UI. VIM's UI is also not "new user" friendly but VIM's UI itself is very powerful.
Blender and VIM are made for speed with familiarity.
I worked with 3D studio 1 (DOS) up to 3D Studio MAX 8. But working with Blender is so much faster already. Even tho I started using it some years ago.