Specifically what do you think it is about you that qualifies you as either good or bad?
For me, I think I'm a good person because I'm an empath. I feel intense emotions in other people's perspectives and I feel that helps me to understand people better. Therefore most of the time I will position in my mind how my actions/words would be best said so as to minimize negativity. I don't actively seek to harm others and I don't consider myself to be better than anybody else.
I take that back, I do think there are people I am better than, but nothing to do with race or sex. Simply because me not wanting to hurt others makes me better than those that do.
On the flip side, I think I'm a bad person because if you've fallen off my empathy radar than I will never give a fuck about you again. Its harsh, and I can't help it, but if something happens to make me stop feeling emotions in your point of view then I can be devastatingly nonchalant as to what happens to you.
Short answer: just don't be a dick and you'll be fine.
Long answer: good or bad to whom? To me? See above. To somebody else? Ask them. To yourself? Ask your conscience.
There is no alternative to having your own moral compass - even if you choose another, it's still you making the choice. All you can do is to follow your own idea of good.