Most of our family on both sides have TVs on constantly just for the noise. My husband usually turns it on as soon as he gets home to news or sports. I have it off anytime I'm alone in the house because the noise gives me a headache.
I had a partner who turned the TV on immediately when he got up - for backgroud noise. I'm the opposite.
Now that I have TiVo, I program only a select few programs and watch what I want, when I want.
Dad turns the volume way down and reads the caption - because he can't hear the TV anyway. Works for me. In fact, I now watch TV in both sound and caption because sometimes you miss something and need to rewind and hear/read it again.
TiVo is awesome.