I read only about half the posts, so forgive me for repeating... but I'll toss out my tidbits from the few times I've dropped 40 pounds in just a few months by changing my diet and exercise.
First off, the weight comes off through diet AND exercise, not just diet.
Now, to the food. Several people pointed to protein, and I think that's probably going to be your issue. I suggest buying some chocolate or vanilla protein powder at your local GNC store. Try a 2lb. container until you find a flavor you like, and then go for the 5lb jugs cause they are cheaper. In the morning, try oatmeal. Instant quaker oats, take 1/2 cup with 1 cup of water, through in 1 -1.5 teaspoons of splenda (sugar will bump up your calories for the day) and eat that while you drink a chocolate or vanilla shake made with skim milk.
Also, being hungry at first is because of conditioning. You've been eating huge meals, huge amounts of calories, and your body thinks that's what it needs right now. Drinking water between meals is extremely important. Frequently, when we think we are hungry, we are actually thirsty. When I "feel" hungry, I will frequently reach for a glass of water first. Sometimes it quenches the appetite outright. Looking above me, I see Fredweena hits the nail on the head with this one.
Another problem with big eaters and changing a diet to lose weight is that the the two don't really go hand in hand. If you eat massive meals (I'm there with you) and you want to lose weight, it's hard to change that reflex of eating MORE. Unfortunately FAT is what makes us feel full. So, even though reducing the amount of fat in your diet is generally a good rule of thumb, keeping some in your diet is also healthy for you.
Try whole vegetable products as well. Carrots, celery, cucumber, bell peppers. If you can eat these raw, they are very good for you. Red and green bell peppers are excellent for you, and can be very satisfying if you like them. They make good snacks. You are right about the fruits. Many fruits are excellent for you, but they pack on the sugar for the day. Likewise, many are very high on the glycemic index scale which can be bad for you. That's another suggestion I have as well. Read up on the Glycemic Index and research foods that you can eat with lower GI ratings. These foods take longer to burn and will sustain you much longer than those with high GI values. (
http://www.glycemicindex.com/). This is important for filling full. It also helps with energy issues.
Okay, I'll stop now. Fitness and health have always been important to me, and as I am currently on a cycle of "trying to lose a few pounds of fat" while at the same time keeping up my gigantic caloric intake to sustain new muscle growth, it is definitely in the forefront of my mind lately.
One last point, that I'd like to reinforce that I think was a good one is : go see a nutrionist. That could be very helpful for helping you set a diet schedule and also to just be more informed. I believe being informed about what you put in your body helps you make considerably wiser decisions about what you put in there.
Good luck!