I happen to really like the Samsung faces..I think the shading is far better than anything else I've seen (and maybe only possible by developing right on tizen?) and the motion on the background (changing reflection) doesn't seem to be anywhere else. I'd love to find more like these.
That said, I've found a few analog faces that are OK on facer (screen shot attached) that TL Casual may be always on but I think it just took 30-40% of my battery in 2 hours. None of the facer faces can match the shading of the Samsung faces.
Also check out flexible by Lucas Philipp in the Samsung app store.. Doesn't kill your battery and is a nice analog face.
Someone posted about an as aod app, but besides battery life, I'd personally wonder whether it burns in the display. And I'm not sure you can recharge during the day to keep up with the battery drain of a true aod face?