Things I like on pizza:

Good sauce w/ fresh ingredients & about a 13:7 Oregano:Marjoram ratio
Chewy, but not bulky crust
Cheeses

Mozzerella (~67%)
Provolone (~25%)
Parmesan or Asiago (~8%)

Toppings, at least 3

Proteins - on top of the cheese

Crumbled Feta cheese, especially if it's been marinated in Olive Oil & Oregano
Pepperoni
Occasionally, Shellfish
Canadian Bacon

Fruits, Vegetables & Fungi - under (in) the cheese

Olives

Green Ripe
Kalamata, if Feta is present
Black, if Green Ripe aren't available
Green, sometimes

Sauteed fresh Mushrooms of every & any kind, but especially Shitakes
Pieces of Marinated Artichoke Hearts w/ the juice mostly squeezed out
Broccoli florets, especially cut to the size of nickels and microwaved in the liquid left over from (microwave) sauteing the mushrooms just until they're bright, bright green
Diced tomatoes, cut just large enough to be distinct from the sauce
Fresh Garlic, cut as above
Fresh Basil Pesto
Sometimes

Jalapenos
Fresh Pineapple with the juice mostly squeezed out, especially if Shellfish are present
Capers
Diced Pickled Beets
Dill Pickle Chips

Things I don't like on pizza:

Greasy crust
Cheeses

Cheddar
Colby
Jack
Longhorn
Muenster
American
Any Yellow Cheese, and most especially vile canned golden cheese sauce

Toppings

Proteins

Any crumbled or crumbly Sausage
Ground Beef
Anchovies
Canned Tuna
Any salty protein other than Pepperoni

Vegetables

Onions
Green Peppers
Big slices of Tomatoe
Eggplant, Okra, Lima Beans, etc
Anything cut large that tends to get bitten only half way in two