I've had to use a MacOSX 10.3 laptop for a little while this week, to get it set up to run as a temporary CAREO server. What struck me is that while I was using the laptop, just how much I missed Dashboard and Spotlight. If you'd have asked me, I would have said I didn't use them much, nor did I care that much about them.
But, take them away, and boy do I notice. I kept hitting command+space to find apps and files, but nothing happened. F12 didn't do anything. Frustrating :-)
After the latest MacOSX 10.4.2 update (which seems to have made Spotlight MUCH faster, and make Dashboard use MUCH less resources), I find I'm actually using Dashboard quite a bit now, to check temperature/weather, check GMail account, and now to indulge my strange craving to keep tabs on a few webcams. And, I'm using Spotlight all the time - from a simple app launcher to full content index file locator.