Like kattale, I first tried Scrapbook years ago and found it very cumbersome. Once I opened a Flickr account, I more or less abandoned it because copying and pasting the Flickr embed code was so much easier.

My main storage for photos is my computer, backed up to an external hard drive. Only the best make it to Flickr and I only use Scrapbook occasionally for photos I want to use to illustrate an LJ post but which are not good enough photos in themselves to be put on Flickr.