A Caveat Lector post from earlier today made me realize somethin I hadn't before - LJ is more often used for personal than professional journals because it has versatile filters. Blogger doesn't allow filters - it's all or nothing. A fully transparent public format isn't always suitable for personal blogging, but is suitable for posts which are always publically appropriate.
(Personally, I don't see what's wrong with having closed communities for professional development in addition to open ones.)
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(Personally, I don't see what's wrong with having closed communities for professional development in addition to open ones.)