I was wondering, has anyone used plywood instead of sheetrock for their walls. I plan on using theatershield and Fabric to cover my walls, so is there any reason to go through the labor of sheetrocking. Plywood(in my opinion) is much easier to work with. I figure I could using caulking to fill all seems. It also seems that plywood would be better at containing sound. Are there any negatives? I'm not concerned about future resale reasons for using sheetrock. It just makes sense that since all wall surface area is going to be covered that plywood would work well. Thanks for any opinions.