From Supernatural? Possibly all of them except for this latest season. When I had a TV in my room, I used to just put the DVDs on in the background while I worked - when I got a little bored I would glance over and watch a couple of scenes.
That being said, I think I've watched Mystery Spot the most. It's a really good episode.
In Other News:
I think I actually found evidence that the hoodie Dean wore in Faith WAS one of Sam's. I just thought it was a fandom invention - like the whole "Dean sleeps closest to the door" thing, (they vary which bed they sleep in in the show). But Sam IS eventually seen in a remarkably similar hoodie....a whole year later, mind you, but I'll count it.