I take pictures (but relatively few - maybe a couple times in a week-long trip) just to look at them in the future - they're great for bringing out memories of a certain place, situation in life etc.
I take lots of photos, but mostly as part of the experience not being the experience. I'm not gonna waste time setting up for selfies or clearing out people to get a group photo or any nonsense like that - most of my pictures will never have me in it - but they're photos that show my take on the history, culture, scenery and beauty of the area that i'm experiencing and I love to share that with friends/family people who may not be able to do it.
I travel for curiosity - so photography helps me capture it in a way that i can go back and study the history, find other photos, see how its changed, connect the dots, fill in timelines - learn more and discover more that i may not have been able to do with being consumed in being there in the moment.
The only selfie i ever took was me standing on top of a 14er... which was a huge accomplishment for me at the time but i never share that with anyone but my family - otherwise they'd never believe it :)
never understood the fascination with NOT taking photos but also i've never understood those who take photos to make them the center of attention either (the instagrammers)