I can't stand it....never could. I do it from time to time to please DH or the kids but really, it annoys me badly. I hate the way other people will speak during a show....or move their mug and stop me from hearing what's being said...or suddenly want to pause it etc.
If I watch alone, there are no interruptions....I DO watch with DD because she likes it a lot...and I don't show my annoyance but GOD! I like being alone for TV and films!