I've been reading some articles where people have used Spybot and find that spybot does not remove all the spyware on their machine. Now I love Spybot. I have it installed on most of the Windows Machines I use. Why do I like it?

Its called teatimer. According to the site:

The Resident TeaTimer is a new tool of Spybot-S&D which perpetually monitors the processes called/initiated.
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In addition, TeaTimer detects, when something wants to change some critical registry keys. TeaTimer can protect you against such changes again giving you an option: You can either "Allow" or "Deny" the change.

As TeaTimer is always running in the background, it takes some resources of about 5 MB.

Even though it is eating up resources it is well worth it. I have never had spyware on my machine. This might also have something to do with the fact that I exclusively use firefox for all my browsing!