I'm a S&P&W guy. I don't like to work the meat too much, I like to see the crumbly texture of the ground beef.
If cheese, it has to be the sharpest cheddar I can find. American cheese is the bud light of cheeses: no thanks.
Super hot grill. I like the outside crunchy and the inside medium rare. The meat doesn't get on the grate until it registers 450F. If using coal, let them burn for a long while with the top open. You'll have 450F soon after replacing the lid.
Never press a burger on the grill. Want to avoid the fat bloated burger patty? When making patties, push a depression in the middle of it. When it cooks, the depression pops out and it will be perfectly formed.
If you're looking, you ain't cooking. Figure out the timing of your grill so you don't have to open it and cause those nasty flare-ups. A little scorching is OK, but nobody wants a carbon patty.