I actually was able to find an article that devoted some time to self portraits with the S3.. It has anti-shake feature which is good because it's hard to have a steady hand when taking pics of yourself...
Also, the S3 also has a "beauty mode" which as face detection as well as a "denoise function" to smoothe out your skin etc...
Shooting self-portraits with the Galaxy S3
The Samsung Galaxy S3 offers, just like its predecessor, a 4x digital zoom lens, by ‘pinching’ the display, you automatically zoom in. To enhance image quality, the Samsung Galaxy S3 has an image stabilization function, via the photo settings menu you can turn on the 'Anti-shake' function, in order to counteract camera shake. This menu also has 13 different scene modes, as well as 3 different color effects. Additionally, you can adjust the flash settings. With the Galaxy S3, just like with the Galaxy S2, you can easily take self-portraits, thanks to the 1.9 megapixel camera on the front. With one tap on the screen, the camera is activated on the front, so that you can see how the photo will look.
Here is another review of self portraits with S3
The front facing camera remains nothing to write home about at just shy of 2MP and packing a sensor that looks a bit past its sell-by date. Pictures of yourself are good enough for a video chat, a quick self-portrait or squeezing a spot, but images do look flat, slightly grainy and a bit washed out. Thinking about it that could have just been how I looked on the day.
Read more: http://www.gizmobird.co.uk/2012/07/s...#ixzz2Ec5zil3V
So apparently Iphone5 is superior when it comes to front facing pics.