The crust isn't that important...it's just bread, a filler. Without it the pizza would still taste good, but it might be hard to handle.

The cheese is good but without it the pizza would still be nice. A large, triangular breadstick with sauce on it. Mmm...

As for toppings, I never get them. I just don't like most toppings.

So it has to be the sauce. Without it the pizza would just be bread with cheese on top, and that just ain't gonna cut it.