Fuck people who don't eat the crust.
If the crust by itself isn't really good, then it's not worth it. This is usually the case with Greek style crusts.
But with Italian crust, if it's made with the right dough then it's great. Sometimes I'll save the crusts for later and dip them in a mix of oil, parmesan, garlic, and Italian seasoning. A good crust that isn't too heavy will get eaten right there on the spot. Honestly, I'd rather eat whole slices of pizza (crusts included) and save leftover slices than eat just the topping part and leave a bunch of crusts, but like I said some crusts can be saved for later.
Let's talk about toppings. This is how I'd rank my preference in toppings:
Meat
1) Pepperoni
2) Sausage
3) Salami
4) Chicken
5) Hamburger
6) Bacon
7) Ham
8) Anchovies
From the Garden
1) Peppers
2) Onions
3) Mushrooms
4) Roasted/cooked tomato
5) Broccoli
6) Eggplant
7) Potato
8) Raw tomato
When it comes to vegetables, I usually prefer when they're caramelized or roasted rather than raw. As far as additionally cheeses are concerned, I prefer ricotta to parmesan but both provide a little something extra in the right contexts.