Based on my experience, Flickr actually is not a great way to share photos with family and friends - it's much worse than Yahoo Photos used to be. The main problem is that it's not easy to share a group of photos without creating a permanent, separate "set." For those who like to send around groups of photos, the number of "sets" you need to create quickly gets too large, and they become unmanageable.

Flickr should allow you to use Organizr to create a group of photos and send them using Yahoo Mail, without having to create a permanent set. This would make the service a lot more useful for sharing purposes.

Having said this, you can work around this problem by installing the Flickr application from within Yahoo Mail. That application isn't as easy to use as Organizr, but it does allow you to send groups of photos without creating a permanent set.