I had a supracervical hysterectomy back in august. Are you keeping your cervix? Having your cervix removed can result in slight vaginal shortening. You should discuss keeping it with your doctor.
You will lose the uterine contractions you experience during orgasm, but will still have the strong vaginal contractions. I've noticed that my orgasms have not changed (they will be different for the first few months post-op, don't be alarmed, a lot of nerves and blood vessels need to knit back together).
I'm 38 and weigh 135 pounds. I've weighed about this much for the past 15 years. I lost a little right after surgery but am back at 135 and have resumed my exercise regemine and have noticed no difference with my metabolism. I belive the big difference is for women who have their ovaries taken out. Losing your ovaries pre-menopause can wreak havoc on your metabolism.
For more info and online support through the preop and post op, you might want to check out hystersisters.Com.
Take care.