I always think that a radically different perspective helps us adjust our outlook on things. I know the thought of choosing your parents might sound crazy to some or many of you. But then I have made it my business to further our/your/my thinking and help change our current cultural thinking because much of it has become stale and ossified (I like that word) and could use some refreshing. Do you have an axe or two to grind with your parents? We easily blame them for what they sent us into this world with; for what they did or didn't do. Looking at it from a different perspective helps. As my yoga teacher Aura Lehrer said recently "life is not about right or wrong, life brings you experiences and opportunities."
So think about your parents from that opposite perspective, not the one in which you are the victim, but the one in which you are the recipient of a valuable quality or trait or ability or realization.
I have a lot to be thankful for from my parents. They have been lifelong learners and taught me to become a critical thinker. We lived in different countries when I was young and so I learned to love traveling, discovering different cultures and how people do things elsewhere, and to explore and enjoy the different foods all these cultures have brought forth. On the other hand I could blame them for not being very emotional and showing their deep love and appreciation for me enough (they are kind of "Northern" in their emotional behavior - hiding their emotions and you have to read between the lines.
But parents can also teach you by default, by not showing you love or acceptance, or whatever else you think you need. In that case their behavior may be making you aware of a quality you'd like to add to your life that is currently not there. You could turn your attitude around and instead of blaming your parents for what they didn't give you, you could be grateful for making you aware of something you need that you are currently lacking. By default my parents have taught me to tell my children all the time how much I love and appreciate them, something my parents never openly expressed - although they are changing a bit as they are becoming older.
So what if you had chosen your parents before incarnating (oh, another radical thought) in order to learn and become aware of specific themes you need to work on? Just a thought....