Beautiful work! These are great intimate personal stories, and the photos are wonderful! It's really a neat idea.
You capture a really natural quality on the voices, almost like a one on one conversation with the subject. On a technical level, there is only an occasional spot where a subject's voice level dips down a little too low to where I feel I need to reach for the volume knob.
My one other comment has to do with the sound effects you capture. They are very well recorded and serve the story well, however, they sound like they were recorded very close up with a stereo microphone. In some ways I find this a little distracting to my ear as the sound effects render a bit 'wide' and my ear gets pulled to the right or left audio channel away from center where the subject is speaking. I listened to a few of your pieces in mono and I prefer the compressed stereo field. I think the balance between the voice and sound effects is about correct though.
Really nice work. This is a great project you have. Congratulations!