Keep doing what you're doing. Different things are going to be offensive to different people. On my end, I get pissed off when people finish what I'm going to say because it makes me feel like my words don't matter. Treat your partner like you would treat anyone whose opinion matters to you and you should be fine. Above all else, COMMUNICATION! Be brutally honest with each other and talk through what you want. My girlfriend and I have the same type of deal. We don't hold anything back and we've never been stronger.