I see no reason to use Google photos. Having a cloud back up is nice, but I'm the kind of person who wants to locally encrypt anything personal backed up to a server outside of my control. I assume Google trawls through every photo you upload using facial recognition to ID everyone in them, identifying what products are in the photos, making guesses about your economic status and habits etc. No need to hand over the intimate moments of my life, my friends, and my family to help google build a better dossier.