i love tumblr... i've used xanga, blogspot, livejournal, etc etc and this is by far my favorite.
mine is mostly used for fashion inspirations, wants, needs, songs, b*tching, etc.. i love it. it's great because you don't feel obligated to pay attention to everyone's comments, blogrolls, etc like on blogspot. it's clean and easy to use, and i love reading my subscriptions when i log in.
here's mine:
http://omgiwant.tumblr.com