I froze my ass off
Without all the extra fatty insulation, I froze what was left of my ass off in the wintertime. I live in New England, so I needed to completely reimagine how I dressed in the cold. Buh-bye mid-length coats; hello floor-length quilts.
Some people seemed out to sabotage my weight loss
There were family members, friends, and co-workers who had no problem with me, but had a hard time being supportive after I lost a bunch of weight. I've learned to say, "No, thank you," with the same pep and speed as I used to say, "More, please!"
Two people never stopped pushing me to lighten up, to skip workouts, or to eat the kinds of Frankenfood absurdities that, while probably delicious, are also probably not that great for keeping the weight off. Sticking to my plans in spite of these people helped me develop a sense of ownership over my new lifestyle. Really, I owe those asshats a debt of gratitude.
I got pissed at my doctors
I endured a lifetime of heavy sighs from every doctor I ever went to, from my pediatrician to my gynecologist. Then I lost weight, and all the smiles and the kudos and the congratulatory nicey-nicey made me ragey. Still, I behaved myself -- when my primary care doc went in for a high-five, I kept my fist open.