I generally go without the cheese, but when I'm in the mood for it and get cheese, I like it mostly melted to completely melted,..... but not dripping, saucy, or runny.
For cheese type, I like American on burgers ..... white American. I grew up in RI, where almost all cheese is white. You rarely see that yellow or orangey stuff there. I guess their cows don't produce yellow/orange milk like the rest of the country's cows! ;) You do see the orangey/yellow cheese at national chains like McD's. When I was a kid, I thought the yellow/orange cheese was some sort of McD's proprietary thing to match the golden arches or something like that. Later, when travelling the country, I realized that that "weird" yellow/orange cheese was everywhere!
For cheese placement, I like it directly on the meat patty, and then other stuff like onions on top of that. This way, if there are too many onions, etc., it's still relatively easy to remove some. With cheese over onions or pickles, etc., you're "locked in". Any re-arranging or removal of excess stuff requires major surgery.
Glenn
<message edited by Glenn1234 on Wed, 12/29/10 3:09 AM>