When talking about things that excite and interest you, here are some pitfalls you'll want to avoid:

1. Don't dominate the conversation with your own enthusiasms. Be sensitive to how much time you devote to your own subject without hearing again from the other person. It's alright to let her know what turns you on, but be aware that she may not necessarily want to hear everything you have to say about that topic.
2. Avoid Jargon or technical terms when discussing topics with her and she isn't familiar with the subject. You can give her an inside look at what excites you about the topic, rather than overly specific details.
3. Be careful not to lecture or try to "sell" her on what you believe in, regardless of how strongly you believe in it or how important you feel it is. She may want to learn more about a subject that interests you, but they don't necessarily wish to be converted to your point of view.
4. Don't tell personal secrets in the early stages of a friendship with a woman. Of course, it's flatterin
   g to her to be told something confidential, but if this is early on in a friendship, the person is likely to think, "If he tells me such personal things right off, he probably tells everyone." Wait until the time is right, and you've established trust.
5. Don't try to override her point of view with your superior knowledge of a subject. Be receptive to her point of view and listen to what she has to say. Then, when it's your turn to give your opinion, she will be more receptive and open to your ideas.