I do, most of them are messily put on a shelf in our baby son's room at the moment as we are renovating, there's also a few in our bedroom cupboards. Once the house work is done I will find a more permanent solution for them, most likely in the office.
I started off with the Technic sets, I still have about 10 or so of them in the bedroom cupboards also which I need to sell, but when I bought my first brick built set (Ecto-1) I realised that the Technic builds are pretty crap really in comparison and just bought brick built sets from then on.
I just realised I bought my first set 26 months ago and doing a quick count I've bought more than one set a month. No wonder my wife is sick of them haha. I also have a few sealed sets put away for the future.