Writin.com is one of the best site I've ever come across and undoubtedly one on the best sites writing sites out there. Really friendly community, fair critiques, and so many aspiring stories make it an awesome place! You might think it's boring, because its just a writing site, but there are so many things to do: writing and non-writing tasks- that it's really addicting. You MUST check it out, even if you ain't an aspiring writer. It's the closest thing to an ideal world in my view.
Thank you, Moksha!