I re-arrange, but not as much as I used to.
We have a sectional couch and our TV is basically stuck in one place b/c of the cable and the placement of our fireplace. Can't re-arrange the bedroom b/c we only have 2 walls the bed fits on (due to windows and doors)...plus our TV is wall-mounted.
I re-arrange my office quite a bit, I was actually thinking about doing that again soon...maybe moving my desk to the loft....:shrug: