You use Weber brand Chicago Steak Seasoning? I use that often and it is tasty on burgers.
I grill more in the fall/football season than summer, but I do a fair amount in summer as well. Our favorite summer grilling is veggie sandwiches...we slice up peppers, mushrooms, zucchini/yellow squash and onions (sometimes eggplant) and grill it in a marinade. We buy fresh ciabattas from a local bakery and toast them on the grill with a fresh garlic/butter mix and add mozzarella cheese and despite no meat, they are freaking delicious. We eat that almost every week in summer/fall when we can get the fresh veggies from farmers market.