You know, I have all the dvds, have them ripped so I can watch them on my iPod and have watched them several times through on NetFlix, but nothing beats being able to catch a random episode on tv.
By way of the Season 1 DVD set, I have had the pleasure of viewing "Murder By the Book" on every September 15 for at least the past six or seven years.
And then there are the pop-ups and squeeze credits. Maybe not on every network (and some networks have actually DROPPED those things, luckily), but on so many. Pop-ups / squeeze credits almost single-handedly wrecked TV for me!