Spotlight has to be a Top 5 feature of Mac OS X

The more I use Spotlight, the more I wonder how I lived without it for so long. Just yesterday I could not remember where I had stored my resume (Which has not been updated in a very long time mind you). Instead of trying to search the 4 hard drives that I have connected to my Power Mac G5, I typed in my Name in the Spotlight search bar. Within a second or two it had found my Resume!

When I am at work on my Dell notebook, I find myself hitting the ALT + Space (Mac users: that the same as the Command Key) and nothing is happening. Then I realize what Operating System I am on. (Damn!) I also come to the realization even if it was available, I know it would not work as well as Spotlight!

If you’re a Mac OS 10.4 user, what is your new favorite feature?