What s behind your chair?


Having been the butt of jokes for last week's "What's in front of your chair?" thread, I will once again stick my neck on the chopping block and start a similar thread.

Right now, I have a cloth covered oriental folding screen against the wall 4 ft behind my seat. It definitely helps with imaging compared to a bare wall. However, I am considering putting my floor to ceiling bookcases behind my listening position filled with records, CDs and books. There is enough variation that it should be a pretty good diffuser.

Does anyone have an opinion as to what works best behind'ya: absorbers or diffusers? With what audio specific products have you had great sound? e.g. RPG skyline. How about DIY Tweaks? Let the games begin.
metaphysics
Post removed 
When I put two bookcases (about half-filled), one floor-to-ceiling and one 4 ft high, in the back of my home theater room, sound became richer. Putting tube traps in the front corners got rid of the boominess. The room is only 7' x 11', so I didn't expect a big, rich sound, but I pretty much got it.
I put a rug pad on the wall behind my chair. My friends keep asking why my systemsound so "quiet". I think I know.
Good for you for having the courage to withstand further ridicule. Behind my listening chair, I have many 2 x 4 foot acoustic panels made from Masonite, convoluted packing foam, and acoustically transparent white fabric. These homemade panels were inexpensive, yet they are surprisingly effective. I have experimented many times with and without them under differant listening conditions, but I always put them back.
Out of the extreme jealousy I have for Angela and her husband, I've found the only way I can deal with it is recognizing I have the Pacific Ocean behind my listening position. O.K. is 1600 miles behind, but I'm talking survival here.