Iphone 5 and Ipads sharing photos
While not automatic, you could setup separate iCloud accounts for each of you (but still use the same iTunes Store account so that you can access the music, movies, apps, etc. you have purchased) and then share a Photo Stream with each so that you can choose what you are sharing with each other.

That would be using Photo Stream. I'm not sure if there are better ways of doing it with some other apps.