I've got an odd room
My home theater is in an oddly shapped room featuring a fireplace with glass doors, a glass slidding double patio door and opennings to a staircase, a hallway and an adjoining room. Obviously, this setup is less than optimum.
That said, however, the room is blessed with thick carpet, drapes and half a dozen tall book cases that help absorb reflected sound. All and all, it gives me a reasonable sound without exotic treatments.
Eventually, I'd like to take a dividing wall out from between the 2 small rooms adjoining my current home theater, upgrade to front projection, and move the whole nine yards over. That will probably have to wait a few years until I'm retired and can do most of the woork myself.