Great start,
as for 3 point. No, if you will lose weight slowly, you wouldn't have lots of skin. I was working at gym, where really big guys became fit. And they do not had ugly skin. Those photos of excess of skin are about losing 30 pound/ month which is dangerous for health.
4. You life would be better in every way. Obesity brings a lot of threats for your health, so you are not missing anything if you lose weight. Moreover, after losing weight you will feel that you can reach everything in you life and the dreams will come true.