@acer621 Sure!
I am a person who loves to eat. I never tracked calories/counted macronutrients before this, and I just ate whenever I felt hungry. Being on prep puts you at a caloric deficit below your maintenance weight. For example, let's say you need to eat 1,800 calories to maintain your normal, healthy weight. For bodybuilding prep, you might start at a deficit of 1,600 calories, and then over weeks' time, drop down to 1,300 calories per day (basically what I did - I added nutrition info to my post). I was hungry A LOT. I had to complete pretty intense workouts when I didn't feel full & strong like I normally would from a larger meal. I also tend to get HANGRY, which wasn't always great for the people around me. Eating less food and dropping to a lower body fat also affected my sleep - there were many nights where I just didn't sleep well or couldn't fall asleep at all!
This is just my experience. I have a friend who competed with me, and she seemed to have a much easier time with prep. She didn't experience any of the crazy mood swings that I did.