2 year old's eating habits

We've never really thought much about the eating habits of our 2 year old. He almost always is presented with whatever we are eating at any specified meal. Sometimes he eats it sometimes he doesn't. He goes on unexplained hunger strikes from time to time ... refusing to eat both lunch and dinner. Other days, I swear he eats more than I do. We get frustrated alot by the above behaviour, thinking he should eat like we do at each meal, but have never taken the time to actually see if there is any research out there.
So... the following is some facts / ideas / hints / worthless dribble I picked up over the past couple of days:

-According to the American Academy of Pediatrics(AAP), toddlers need at least 1,000 calories a day to meet their nutritional needs for growth and energy

-The best way to provide your child with these much needed calories is to give her three meals and two snacks a day.

-According to the U.S. Department of Agriculture toddlers need foods from the same for basic food groups as adults do, but the serving sizes should be two-thirds of the adult serving size.

-According to the Ohio State Agricultural Extension, a good rule for serving sizes for toddlers is 1 tablespoon per year of age or 1/4 of an adult serving per year of age. For example, a serving of milk for a 2-year-old would be 1/2 cup, a serving of cooked carrots for a 3-year-old would be 3 tablespoons, a serving of ground beef for tacos for a 4-year-old would be 4 tablespoons.

-Your toddler should eat indicated servings from these food groups every day:

• Meat, fish, poultry, eggs (two to three servings)

• Dairy products (three servings equivalent to two cups of milk each day)

• Fruits and vegetables (three servings each)

• Cereal grains, potatoes, rice, breads, pasta (six servings)

Here are some interesting tips I saw along the way:

Toddlers: When Yours Doesn't Want to Eat -- familydoctor.org
Kid Friendly Veggies
FEEDING TODDLERS: 17 TIPS FOR PLEASING THE PICKY EATER