Is it normal to have no conscience?

Hello

For as long as i can remember i have had no conscience, empathy or guilt. Some say this makes me a pychopath or sociopath. Maybe i am. However there is a slight problem with that classification. I have friends, close friends, a girlfriend. I have a normal social life, i don't set fire to things, injure animals or have a criminal record. I am committed to my girlfriend, not only have i never cheated the idea repulses me. Not because its morally wrong, not because i don't want to hurt her but because its happened to me. So when i think about it makes me unspeakbly angry.

Right moving on emotions, i usually feel nothing, occasionally i'll feel sad or angry or vaguely contented. But no more than that. But my point is that despite having to fake emotional responses and being very good at adapting to change i'm not evil. I habour no desire to kill or maim, i tend to avoid hurting people. As weird as it may sound i have created my own morality based around reason and logic. I don't do drugs because its illogical, i don't cheat because its pointless (you've already got one why do you neeed another??!) I wouldn't kill unless it was justified and i could get away with it.

So my question is this, just because i don't have the normal emotional responses or a sense of guilt to keep me in line am i evil? I have made my own code that serves just as well? Isn't that enough or will i always be evil to those who don't understand those who lack a conscience?