Can we really break free of culture?

What does Nietzsche really mean when he says that we should 'be ourselves'?

Page 1 of Untimely Meditations: Nietzsche defintely has a bad opinion of culture. He thinks that people are being lazy in not 'being themselves', and that the ideal is the 'artist' or 'great thinker'.
Well, I think that Nietzsche is mostly right. We must not be lazy and become 'factory products'. (I know of many people that do not seriously evaluate their cultural paradigm).
But there are a lot of complexities that come into the way. Firstly, culture is not entirely bad, but not only does culture make us, but we are our culture. Can we actually break free and 'be ourselves' when perhaps all we can do is 'find' another culture to believe in? Secondly, 'the mass' is no more that identifiable. In today's terms, what is the mass? Almost everyone is thoroughly different in interests and opinions nowadays. Who are the factory products and who are not? I wonder.
Ultimately, it seems that all Nietzsche is saying to me is the same as what Socrates said all that time ago: 'the unexamined life is not worth living'.