I've used Dropbox, Google Photos, and Facebook. Dropbox lets me generate a link and email it to whoever I need to, but doesn't really have access control beside

I've used Dropbox, Google Photos, and Facebook. Dropbox lets me generate a link and email it to whoever I need to, but doesn't really have access control besides that. Facebook controls access, but degrades the picture quality and isn't accessible to everyone I know. I haven't used Google Photos as often, and the people I've used it with had Google accounts already, but I think that provides a mix of features (access control through shared albums, ease of sharing through generated links, etc). For some people, I just bring a flash drive with photos on it. What's easiest and best depends on who I'm trying to share with. If I had the time, I'd build an OwnCloud server. It would make it more convenient to keep control of my own data.