I am installing a distro on an old PC right now, so am interested in smaller desktop environments. This LXF article has got me considering Trinity as I am a KDE fan and Trinity is a lighter version of it in the style of KDE 3.5. [Notwithstanding the announcement on their home page of a "Gnome theme" version]. I am thinking of putting it on AntiX, a lightweight version of Mepis/Debian.
But installing AntiX is taking longer than I thought. I wanted to put it on a 2.1Gb HD, but after a couple of hours of DVD grinding and me playing and fiddling with settings in Live-DVD mode, the installation failed as there wasn't enough disk space! Needs about 2.5Gb I found out. This same disk once had Debian, DOS 5.0, Windows 95 and Windows NT (and their swap files) all on it, multi-booting, but now even a "lightweight" distro will not fit in, even though I will have a separate data HD, and I am having to re-think.
Looking around for info on "light" distros, on their websites and in DistroWatch, there is a general lack of information about disk space requirements. They tell you all about processor and memory requirements, but not disk space.
Unsolved mysteries of the Universe, No 13 :-
How many remakes of Anna Karenina does the World need?