Up until maybe 6 months ago, I had my system set up in our great room with the speakers on the long wall. And yes, due to the speakers being a bit closer to the wall..and my listening postion being closer to the back wall..I perceived more bass. But it was integrated with all the TV and stuff, so imaging suffered.
Now, I have the system separated from the TV system, and in a short wall placement. Nothing in between the speakers; equipment off to one side. Imaging is much improved...maybe a bit less perceived bass...
Damn, I need a dedicated room...