I love pizza! It's a true Italian food, but what makes pizza pizza is that you need tomato sauce and cheese.
I somewhat agree with you. The "original" pizza will always be the best kind but I have tried pizza made with different sauces that are delicious. 
Yes I especially love alfredo pizza. Some people choose to forgo the cheese, but I like to put extra cheese and make the sauce cheesy too! Meat and veggies are also common additives.
The alfredo sauce is really good, I've also tried ranch dressing sauce and it's really good as well. Pizza isn't pizza without cheese! What are your favorite toppings?
Fresh or frozen, I always just like cheese. I used to enjoy black olives too, but I'm pickier now. My favorite is a full cheese pizza from California Pizza Kitchen.
I may be a little old fashioned in the toppings department, pepperoni is always my go to. The more, the better. Grimaldi's is my favorite pizza spot. 
Where is Grimaldi's located? It's popular in both North America and Europe.
Grimaldi's is located throughout North America. It originated in Brooklyn, New York in the 1970's.
Is it a pizzeria? Those are restaurants that specialize in pizza. Or are they popular for all types of foods?
It is a pizzeria. They do serve other Italian dishes but pizza is their specialty. They also have a great wine and dessert menu.