All those moments will be lost in time, like tears in rain.

 Like moments lost in time, our group equated this quote in our individual lives. We realized that we all have different experiences and memories (but we do have one shared experience). 

 We chose photos that reminded us of our own best memories to encapsulate "I've seen things you wouldn't believe", as in: What moments will we remember the rest of our lives ?

In the Blade Runner, robots and humans do have one thing in common, they still have memories (especially ones like Rachel). Our experiences all make us unique, but we can still come together and have a shared experience.