Subwoofer placement

I have a home theater only setup in my living room and I was wonder about the placement of the subwoofer. Currently, it is in a left corner facing the sofa. On the right corner is entrance to the kitchen.

I think the sub is extra boomy where it currently lives. I thought about moving it to the other side where it was still be close to a wall but not in a corner. I've moved it and it sounded okay and lost the boominess but not sure if this is better or not. Should movies get the most bottom for the buck or should I treat them like audio and get a flat response as possible?

Do home theater setups require bass traps? Currently, I do have some auralex stuff around the room to keep from getting overly live sound from the movies, but that is it.