Netiquette discussion

Currently there is a trend in circular graphics and squared corner edges. This discussion hopes to be one with a long thread. What are your favorite communities and why? Do you like the layout? How does the engagement suit your needs? What makes a community shine?

Circle: I like the User Interface of Goodreads. However, I get frustrated with navigation sometimes. All in all, It feels very personal to me when I use it, which is good.

Square: Goodreads is my favorite community because the feedback I receive is helpful. I love all of my friends.

Shining: I have yet to meet any shining stars other than erotic authors and I have not read an erotic book yet. Erotic authors connect with me in the most genuine ways.