Going through my fileserver recently I stumbled upon the directory I'd put screenshots in over the years that I've used Linux. It covers back from 1999 until the present, enjoy.
My first linux computer running Redhat 6.1 using GNOME v1.0.39 from 1999, this shot was taken in 2000 and shows all the fun of connecting via dial-up.
Still running GNOME this time I believe it's Mandrake in 2001
My Windowmaker fetish begins while running on Debian circa fall of 2001
My Fluxbox fetish begins in 2002
More Fluxbox goodness, from senior year in 2002
Fluxbox again after college graduation in 2003
Final Fluxbox shot after I moved to San Diego in 2004
Moving onto XFCE in 2004
And finally, full circle we come back to GNOME running on Debian in 2008