Only you can make that decision, but I tell you why I stopped after a year or so.
I approached PAD here at Pbase more or less like any other typical ‘Photoblog’ on the web with the thought that it might be a means for establishing a visual dialog of sorts.
It did not take me very long to realize that taking the daily photo and posting it was the easy part.
While I was contributing to PAD the real challenge was to find the time to look at other people’s photos in depth, attempt to understand their images in context of the rest of their work.
I don't know if this makes any sense, but I basically stopped, because that intrinsic part of PAD, looking at photographs and writing comments takes a lot of energy and a tremendous amount of time.
( My PAD archives are here:
http://www.pbase.com/5points/random )