Haha! Yes, I guess we are all different both in the realm of weight loss success and pleasure derived from exercise.
The latter is actually a much bigger reason for my swimming. I've battled severe depression most of my life and swimming is my alternative to being on anti-depressants. And in saying that, I remember that 'Hey! My depression affects my ability to lose weight!', so there's another factor. That plus genetics are really working against me. But the fact that my mother, my grandmother, and my great-grandmother all had hypertension, and diabetes runs on both sides of my family, leads me to believe that regardless of whether I EVER shed those extra pounds, I NEED to keep swimming in order to stay healthy.
That's interesting about birth weight and maternal weight having an impact on the child's projected weight later in life.