I haven't used Ubuntu in quite some time.
About 3 years ago I was using Xubuntu, but I've opted for
the lightweight/minimalist approach to the Desktop.

These days, I use Crunchbang Linux 9.04.
It just starts out "lighter" as opposed to getting a `buntu and
then slimmint it down.
It runs Openbox by default, so basically I'm using a Window manager
to interact with the machine as opposed to Window Manager + Desktop Environment.