I can't really talk to my parents about anything.
My Mom, because she's really unable to see anyone's side apart from her own. I mean, I totaled my car and almost died about 4 years ago, and the only thing I heard about it was that it was "such a huge inconvenience to have to drive me back and forth to college and work" when I called for her to pick me up she never asked if I was okay, or anything, just "I can't believe you were so careless."
My Step-Dad, because he's an idiot, and only hears what he wants to hear. I had to explain that when ordering something online the note that said "Only available in-store" doesn't mean it's in stock, it means you can't order it online you have to go to the store and buy it. To which he asked me "So it means it's in stock."
Ex: About a month ago, I had my lady-friend over while she waited for her sister to get off work. She got off at midnight, her sister got done at 1am, and I lived like 2 blocks away from where her sister worked (She live about 35 minutes away), so I offered for her to come over and hang out.
Long story short, we went to my bedroom and had a little fun, and this is when I found out that she has issues controlling her voice... Awkward conversation in the morning because we ended up waking my parents up. My mom tried to have "The Talk" with me... and I'm 25
Another thing is I normally don't bring my female friends over unless I'm home alone, not because of issues like that, but because my parents ALWAYS assume that I'm dating any girl I walk in with, or am seen in public with or say their name... And they never believe me when I say we're just friends.
EDIT: My Dad, I can't really talk to since I haven't seen him in like 8 years, but when I did see him he was really the only one I could talk to about anything. It's a shame my mom is more concerned about getting the child support money from him than anything else, because I would probably get away with seeing him every now and than.