system
sentimental: old images from the past wall
human
ever feel so full of emotions when looking at old pictures?
gpt
Yeah.  reminds me of the good old days!  
human
for me it's when you get more than just nostalgia, when you get sad, happy and sentimental 
gpt
Yeah same here.  I remember one time awhile back I took some pictures of when the aliens landed in my backyard.   That was some good times!