I like facebook because the layout of facebook is very good. The best thing i like about facebook is privacy.
I think you are right social networking site is knowledge and thinking sharing site. Thats why today many are using eZdia - a trusted knowledge platform where people come together to learn, earn, and create a better future. Users can browse the comprehensive content library and ask the associated experts questions to enhance your learning experience. Thus you can have a network with the experts around the world.
For me Digg and StumbleUpon has worked. Other than that I also use Orkut for some promotion and it works. - Digital -
Myspace is one of the biggest, famous and nice among social networking sites. You can spread the word about your sites on your profile page without any fear to be banned or reported. I like it very much as it has many other good options needed for site promotion
I'm bored with Facebook and Twitter is okay. I use Twitter mainly to gain followers. I just signed up with StumbleUpon, so I'm not sure how well that works. My Space seems like mainly singles trying to hook up with a partner.
I like digg.com and every dofollow bookmark websites. We can get both traffic and backlinks from them.
Facebook can be much more viral if you put together good information. In addition, you can leverage your pre-existing network. I am new to twitter and still trying to understand how best to use it. For now, I find it to be of little value. I am sure my opinion will change later.
I like facebook, just because it is simple and easy to use. I've found practically everyone I've ever known on it.
Yeah, the application invitations are a bit annoying but maybe this is one of the reasons why people like Facebook, the applications, but personally I prefer MySpace.