I tend to find that Bioware writes these "edgy" characters fairly well. I feel like they elicit this feeling of giving another person a chance, and they mostly stick the landing with them. I remember having the same feeling with Jack, Sera, and even Leliana if I remember correctly. Thought they were edgy and lame at the beginning, but once you give them a chance, they're actually well fleshed out characters that have at least some sort of point to make.



Also, Jack was positioned as anti-social. She was separated from the rest of the children at that institute, and I believe locked up in solitary afterwards. I think they justify her behavior well enough for me to be able to buy it.