Since we're talking about flavor, good point Oldpink. I definitely prefer ground chuck, over plain ol' hamburger. Sometimes (depending how much I am cooking) I get ground Bison, add seasoning and right before I put cheese on it I let a small pad of butter melt over the top. Then add cheese and bacon (but not always). Now whenever I grill Bison burgers I always use hickory chips with the charcoal to give it just a kiss of smoke flavor
Mix in a raw egg per 1 lb of ground meat. Use your hands and really mix it in there - pretend you're making meat loaf.
Mince some onions, too, if that's your thing.
Start with 1 Tablespoon of Worcestershire sauce and mix that in. If it can handle another T - then add that in, too. Don't let the slurry get too sloppy or you'll just have to add more meat which you may or may not have ready.
Make patties then grill.
OR, if you're feeling really froggy, mix 1lb beef with 1lb mild dinner sausage. Then add an egg or 2 to the mix. Mix it up well, then make patties.
Really? An egg?
Extra ground chuck?