How many people are you following on Twitter? If it's more than a hundred, I bet your Home stream is crazy like mine. I don't even look at my Home stream anymore. I have no choice but to use Lists to segregate the people I'm interested in listening to and tweeting with, and if you're not in one of my Lists, I will likely never see your tweets.
It's not your fault, it's mine. When I first started using Twitter, I did all the wrong things to grow my following. Instead of simply being active and sharing great tweets, I used the Follow First method blindly, as well as several websites where you follow people on Twitter to earn credits which are then spent on other people following you.