Agreed the choices are sometimes random (and I'd love to know how it picks) but I've enjoyed some forgotten images!
How many unique pictures does it show for you? Mine cycles between three, over and over.
I was actually mildly annoyed that I had to add the photos icon to my Home Screen because tapping the photo in the widget takes me to that photo rather than the main photos page.
Yeah, I noticed that, too. So far I’m just tapping the widget to get into photos in order to have one less app on the screen.