My mother and I get along very well actually, and I've never met my father.
At this point in my life, I don't even care that I don't know who he is. I feel if he were worth knowing then he wouldn't have done what he did in the first place (slipped something in my mom's drink and had a one sided one nighter with her).
So while I'm glad I exist, I'll not be making any attempt to find the man responsible.
But my mother's an absolute saint, I'm lucky to have her as a role model and parent. ^_^