I started using Debian in late 2002, today I am a Debian package maintainer and use it full time every day at my job as a Debian Sysadmin. On the flip side Im also an Ubuntu enthusiast and now an official Member of the project.
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With the release of Debian Etch as stable a couple months ago there have been several articles circulating comparing these two distributions (such as: Debian as a desktop system: A good alternative to Ubuntu by Yousef Ourabi). Ive also found myself in conversations with several people of various backgrounds about this, including Don Crowder, a hobbist who recently wrote Slowly Closing Old Windows (Living On The Etch).