This. Attributes of my den:
Feet don't stick to the floor.
Fast-forward button for the trailers.
Movie starts whenever I damn well please.
Food at grocery store prices.
If the movie turns out to be crap, I can abandon it without spoiling my wife's enjoyment.
Attributes of a theater:
You forgot one more attribute of your den: Control over the volume button.
The last time I went to a theater, (and I do mean the LAST time!), the morons had the volume cranked so high that not only was it painful to the ears, the amplifiers were well up into the distortion range, making half the dialog unintelligible.