Multiple step registration form design

I have a multiple step registration form. What is the trade off between what information is in the registration form and the profile?

For example should some content such as location be in the registration or should it be in the profile. Also "about us" should that be a profile field or should it be contained within the registration form?

The type of information that I am collecting are basic details such as username password, firstname, lastname, gender. And personal interest data such as books, videos