Ohhhh burgers HAVE to have spices for me. I mean, I'll eat them without spices too, but they just taste SO plain! My mom usually marinates the meat and leaves it in the fridge for 24 hours before cooking it. I know she adds salt, chili powder, garlic powder, cumin powder, cilantro, and other stuff. Its sooo yummy with spices. We put spices in pretty much everything. Not *too* much, but food has to have flavor you know?