I have to admit, that song was what came to mind when I saw the title of this thread. I was reluctant to look.
Thought the same thing as Taxlady did...
The thread title was no accident..
Can you really say that the smell of a perfectly grilled steak is no less appetizing than a freshly made pizza, or marinara, or apple pie, or fresh, yeast bread, or, or, or...
There is more than just appetizing though, there are cooking smells that really stand out. I love the smell of a steak skipping across a grill (if you do more than that you likely over cooked it) but the smell of garlic (or even onions) when they first perfume in butter is just transcendent.
I realize everyone is different though, apple pie is great smell but it doesn't hit those same buttons.