I went with G Suite for a few reasons:
1- I use Office 365 for my school, and I don’t want to have to switch accounts all the time
2- When using Office 365, I found myself using the web versions of Office apps almost all the time
**In my experience, the G Suite online apps are much better designed than the Office online apps
3- It’s super simple to switch between my G Suite and my personal Google accounts on my computer and phone
4- I’m very familiar with Gmail and Hangouts, and wanted that functionality.
In the past several weeks I’ve been using G Suite, I’ve been very happy with it and probably won’t consider switching. As for your mentioning photo backup: I use Google Photos on my personal account and pay for iCloud storage, so I’m all set with that.