I bought a pro account for Flickr and I didn't even have to think about it a lot. I uploaded lots of pictures and created lots of sets and I don't think that I would want to go back. I think that I'm only operating now at a lower capacity than a GB a month in uploads, but when I have more time I take a lot of photos with my largest month of close to 800 photos. Even though I probably won't use the full capacity very often, if at all, it's nice to know that it is there. Kind of like a big stack of blank pages that need to be filled.