You're pretty secure in your own viewpoint. You're not the wishy-washy type, and if you are, you're absolutely dedicated to each particular opinion -- even if you completely change your mind five minutes later. In short, you've got the courage of conviction, but in your past relationships, this often looked to your partners like smugness, or even emotional neglect.
Even when you felt certain that you understood them and their feelings, they were still upset that you just didn't get where they were coming from. If they were the patient, communicative type, they might have kept trying for a while before giving up on you. If they were the short-fused type, they probably left in a huff the first time you gave them that blank look that meant, 'What's the problem, babe?' Sympathy and empathy are essential to a functional intimate relationship. You and your lover are two completely different people, and while you'll each experience life from your own unique perspective, you still need to be able to translate your experiences to each other, and you both need to feel respected and understood. In future relationships, you'll have to work on listening to your partner when they describe their feelings or how they view a particular situation. Even if what they describe sounds utterly foreign -- and therefore negligible -- to you, take them seriously anyway. You may even need to remind yourself on a regular basis that their feelings and perspective are every bit as valid as your own.