Experts believe communication can be divided into five levels:
Level of acquaintance
Sharing of information
Sharing of ideas
Sharing of emotions
Gut level sharing
I have seen them listed other ways, but the key thing is that the first level is just stuff you say to someone you don't know at all, like a checkout clerk, and the last level is usually reserved for the closest of friends. What I have observed is how much people seem to be drifting toward just sharing facts with each other and not really opening up. People talk about the weather, how someone's birthday party was nice, etc. After a while it is like talking to robots. The nice thing about Daily Kos is that people talk about opinions here....their ideas etc. So, please, please, please, feel free to talk about things that are meaningful to YOU here on Daily Kos.
Also, getting into an argument is not the worst thing in the world. When I was a kid I got into arguments with my siblings all the time and...though it could be frustrating....I really felt ALIVE. You might get angry..but it would blow over soon.