I'm not very keen on skype. People sometimes ask me why. Skype have done a really good job of bringing video chat to the masses, and making it really easy, and fair credit to them. But if you want to use skype, you have to use skype software, and skype servers.
I like freedom, and I like freedom on the internet. I don't want to have to run their software, I want to run freedom loving software, where I can study the source code. And I don't want to have to use their servers (which could be compromised by wire tap laws).
I want to use software that uses open protocols to communicate, so I can use open software on my laptop to talk, and can run the services on my servers, if I choose to. I want to use software that anyone can tweak, to implement new cool ideas, without having to have the corporate blessing of a single company. I think that approach can make the world a better place.