I hate them because I have a blood-injury-needle phobia which causes vasovagal syncopes(lightheadedness/fainting). I've had to have 5 surgeries so far, and the IV's are really the only part of the whole process that I find scary/hate. I also don't like when they give you IV antibiotics before they put you to sleep, as that s**t causes my veins to feel like they are all burning. It's unnecessary as they can just as easily adminster if after I am asleep, so I just ask for them to do that each time.