I used to get so put out with Dad for watching westerns 52 times! Now I can't count the number of times I've watched NCIS, West Wing, or any Harry Potter movie!
I watch NCIS almost nightly. I can be surfing the Internet, knitting, stitching, you name it and it's almost always on. I can quote parts of all of them. I need to start an NCIS DVD collection. Some day it will be replaced just like West Wing.
I can't do this with just plain tv. Very few shows don't get on my nerves and can play in the background.