I can talk about anything with my mom...we talk all the time now that i'm back home for the summer, but during the school year we'd talk maybe once a week, and probably email each other 4-5 times a week.
With my dad, its kind of different. I love him, but I'm usually very timid around him because of how he was when I was younger. He's very short tempered so I was always affraid of him. I'm not any more, but that fact that I was never able to talk to him about stuff still remains. Don't get me wrong though, I love my dad to death.