I had an "interesting" childhood which was basically one seriously (for many years) ill parent and the other holding the family together. Three kids. No money. Emotional neglect of the kids, who were lumped together as "the kids" while said parent was being tended to, visited in hospital etc. No hugs, kisses etc, reassuring talks etc.
My Mum is still like this. On the death of my OH, she stayed away on holiday for another 10 days and wouldn't pop over to see me when she got back as she was "too tired". She hardly saw my daughter for the first few months of her life.
The bottom line is - my Mum has let me down badly. Having had a bad upbringing herself, she is emotionally stunted. My Dad had a brutal, Victorian upbringing himself. His mother was a shocker. My father's parenting of us kids was well, very authoritarian and distant when we were younger - he spent several weeks/months on a couple of occasions having serious surgery and then was in a convalescence home. Since I was hitting my teens, he read self-help books and really worked on himself, and was battling debilitating ill-health. He wasn't perfect, by any means, but had come to a point of realisation about things and what his input could achieve.
The result of this is that I have had very low self-esteem for many years. I have helped myself by reading lots of Phil McGrath, Louise Hay, some Maxwell Malz (Psycho Cybernetics) and Charles Whitfield (Healing the Child Within).
I now have a higher self-esteem than I did a long time ago; I know I'm a worthwhile person; I try very hard to be a good parent to both my children (although admittedly, my teenage son presses my buttons a little too often). I have said before on threads like this that my Mum wasn't the kind of mum I needed when I was younger, and now I'm older, she's not the kind of mum I want. I have compassion for her, and have been helping her through a serious health issue - I won't step away from helping her, but I protect myself emotionally.
SAF's post about your parents dying brings a whole lot of other issues with it - in the natural order of things, the buffer between you and death has gone - it's your turn next. The process shift I guess, would be making peace with yourself if that's at all possible.