i really didn't much like Brown Bag Burgers. someone one time told me how great it was years ago and i finally tried it today (had a Groupon).
Danielle had the MacDaddy burger w/ a turkey patty (basically the same toppings as a Big Mac. she said it tasted fine as long as she got a bite w/ everything. the patty wasn't seasoned.
Like Danielle's turkey burger, my beef patties were entirely tasteless. i got a burger w/ 2 patties, lettuce, tomato, onions and A1 sauce. these were diced onions and there was way too much on the burger, though if i hadn't swept so much off there may have actually been something to taste. i couldn't even tell there was A1 sauce on the burger. it was just so bland.
on the other hand, the french fries were really very good.
i'm not sure i'll try BBB again. just didn't care for it too much at all.