Flickr, Zenfolio, SmugMug...
Since we have three candidates, and perhaps more to come, how about users mention some of their perceptions of what Cons/Irritants they feel exist for their chosen picture sharing site?
I use smugmug as my website as I like the ability to format easily and also sell a few images without much effort. Being an old fart with a lack of tech expertise and limited income I just love how easy smugmug has made the presentation my images for me Might look a bit amateurish compared to most, but I'm happy with it https://kevindickinsonfineartphot.smugmug.com/
Flickr for embedding here, https://www.flickr.com/photos/bidkev/ and alamy for stock sales. I also use Redbubble for selling prints but sales are slow on there. Alamy has produced most of my sales for me, mainly editorial, not that I'm that bothered about selling but it's nice to get a few sales to finance my hobby