So to start it all off, I'm of the mind that a good pizza starts with the sauce. Next IMO is the cheese. It amazes me how much difference a good moz makes when making pizza. The bagged stuff don't fly around here! Then the crust.... then everything else. I'm sure some will argue the crust is the most important part but I think from a flavor standpoint, it's the sauce and the cheese. The sauce simmers for a few hours giving everything a chance to get acquainted.
Here's 1&2