Visual Studio allows you to change your working environment, Toolbar, Menubar, Panel places, Font, Color, Shortcut keys. All most all of them.
I have seen many times, that many developers have it's own style to work with IDE, and those developers fills unfamiliarly to do work with another IDE settings.
If you have to format your PC, You will be loss all of your settings, favorite bookmark, your own quick shortcuts etc. But Visual Studio 2005 have a great feature to Import Export Environment Settings. it's easy to use...
Select Tools -> Import and Export Settings...
When do you want to Import any settings select "Import selected environment settings" option, and select file form the directory. but there is also another option to just change environment which one Visual Studio ask you first time when you start it.
This is one think who helps us to make IDE better and better to work with it.