I like to keep a simple dynamic desktop on my work PC that tells me the time and date at a glance.
Rainmeter can do a whole bunch of stuff that can just about replace your desktop / taskbar and turn it into a writhing mess of CPU meters, RSS rolls and weather reports... if you're into that. Me, I just dont like the Taskbar clock and wanted something I can quickly glance at with [Windows Key] + [Spacebar].
https://www.dropbox.com/sh/nryzwwtxt9g84m2/nPbngRdAlM
Lots of customization to be had. I edited these skins so they centre to the screen whatever the resolution. Skins can be Always ontop, with transparency options, click through-able and such.