Well, I'm a complete **** to my Mum, which I feel terrible about. She's a cool person really as well, but what with my hormones raging and all, I always take it out on her, and I feel bad, and sometimes there are indeed stages where I feel like I don't respect her. And she pisses me off immensely, and as you say, there are occasions when I can't believe that I came from her. And sometimes I feel bad that I'm always going to have a bit of her in me!! Eek. But deep down I love her really, she doesn't half do my ****ing head in though! But there are aspects of her that I respect, and I find that I respect her more the more I learn about her. I respect her intelligence definitely, she's rather clever.
But my family situation is completely different to yours, so no, I can't really relate...