I like my computer to keep usage statistics for my personal use, such as which programs I spend most time in or which features I use most from the menus. That's why the adaptive menus in Office 2003 appealed to me. It hid irrelevant detail and only showed me which features I actually used. Yes, it can be a little jarring when the menus adapt again, but the result is a cleaner and more efficient interface. It's the same reason I like to use the Desktop Cleanup Wizard, sadly missing from Vista. They could have just had it disabled by default.
Mokalus of Borg
PS - I am, apparently, one of the few people who liked either of those features.
PPS - I did not, however, have any soft spots for that paperclip.