I built my original theater as a home addon in 2009. She wanted a room with a lot of windows (sort of like a sunroom but insulated) and I wanted a theater. We added on 1700 sq feet to the house lol. Lucky for me, my wife really doesn't are how much I spend on the theater or what I do in there. In fact, I've replaced projectors, screens, speakers etc my wife never even knew. I went from 2 rows to 3 rows and she didnt realize that until I brought her in to show her. I've probably spent over $100k in here and she doesn't complain at all (as long as we aren't going into any debt over it). Originally I put in grey carpet, but that only lasted a couple weeks, it was too bright. It was ripped out and replaced with black. The room has no windows, velvet on the walls, its really just my room.
At first, my wife and 3 kids all liked the theater. But my wife's a pretty simple to please person and never goes in the theater alone. My kids use to be in there all the time. I use the theater daily for watching TV and playing games. I was constantly having to kick my kids and friends out of there and it got pretty annoying. When my kids were younger like 14, I had to kick them and their friends out of my room because they were holding wrestling tournaments in there. I was pretty pissed.
A few years ago (maybe 2015) I reworked the whole theater. It's completely HTPC controlled from turning on and off the gear to playing back all the content. No one here knows how to turn it on. (It actually turns on with one button on my laptop in the other room). That was the best thing I've ever done. Simply, no one knows how to use it but me. A few months ago, one of my kids (22 years old now) asked if she could watch a movie in here when I wasn't home. I just told her sorry, it's too complex to explain and that was that.
This room is truly mine. No one even comes in here to clean - I do that all myself.
Video: JVC RS4500 135" ST130 G4 screen in batcave, htpc nvidia 1080ti madVR.
Audio: Anthem mrx720 running 7.1.4, McIntosh MC-303, MC-152, B&W 802d3 LR, B&W HTM1D3 center, B&W 805d3 surround, B&W 702S2 rear, B&W 706s2 x 4 shelf mounted for atmos, Infinite Baffle Subs 4x15 fi audio running on behringer ep4000 + 2x12 fi audio mounted in main chair firing into back.