I have both Photobucket and Flickr. If I just want to post a photo to a board, I use Photobucket. But in other ways I like Flickr better because it's more of a community, with groups for example. Like I can search for the Twinkle Big City Knits group and see lots of stuff knit from that book. I don't even know how to view pictures from other people's Photobucket accounts without them giving a link to the picture or album itself, so when I want to see a particular knitted thing, I always go to Flickr and search for it.