I've been fine, I recovered pretty quickly, and am still adjusting to life without a gallbladder.
It's a common myth that the anesthesia will cause hair loss. It's most likely the trauma of surgery on the body that would cause some shedding. There is nothing that could prevent that. I was more afraid of my hair getting in the way at the hospital, so I de-tangled and braided it loosely before the surgery. I figured an IV in my arm would make this impossible for the time.
I have friends who've had surgeries and whatnot, and they gave me the best advice. They told me to bring magazines to the hospital, and to have a stack of magazines, books, audiobooks, and movies waiting for me when I got home because I'd be stuck in bed for a while. Also, having a good multi-vitamin waiting for you when you got home, and any easy foods, since you won't be in any shape to cook or have much of an appetite. Don't bother with paying for a television for the first few days, you'll be asleep most of the time, so it's a waste. When you're able to stay awake for more than half an hour at a time, you can always ask for the tv then.