My favourite is seeing pics of members fabric stash, I don't have one, so I like to enjoy everyone elses.
Second is seeing peoples crafting space, great for ideas and as I'm in the UK its nice to see how different some of your homes are. On a UK forum I go on there is a thread in the cooking section called "where the magic happens" and people post pics of their kitchens. Its like that for me to see where you all make your beautiful creations :)
Third is pictures of peoples projects, again lots of ideas to bookmark and I see quilt patterns I would never see otherwise.
Fourth are the chat threads on gadgets, I love to see what is worth buying.