Hi all,
I have to chime in on the mayo and burger conversation. It may be that the general disdain for the mayo on the burger comes from poor quality mayo. There are only 2 kinds of mayo in the world, Dukes, and homemade. Either of these may grace everything from burgers and fries, to pancakes and eggs, but this post concerns the former.
Hellmans, Kraft, and whatever other kinds of insipid creamy-ish gunk you folks are spreading on your sandwiches pale in comparison to Dukes mayo. As far as I can tell it can be found south of the Mason-Dixon, and only at low-brow grocery stores (skip the Piggly-Wiggly and go to Winn-Dixie).
It has 7 ingredients soybean oil, eggs, water, vinegar, salt, paprika and natural flavouring. It is made by the C.F. Sauer company out of Richmond, VA.
Despite the fact that I live in Montreal (a town of mayo-philes), a good 700 miles from the Mason-Dixon line, we always have a jar of Dukes in the fridge (in-laws live in Fla., and send it Fedex)
I implore you to seek out a jar of this stuff. Make a burger, slather it on, then get back to me.
Finally, a note about ketchup. I know that Gingrich and Reagan at one time considered it a vegetable, and that it is an important, one might say cornerstone, condiment in American history, but it's really overrated.
As far as condiments go, mustard, mayo and salsa have ketchup beat any day of the week, on any kind of sandwich.