I'm fairly new to the whole DVR/Tivo thing. In fact, I still usually just call it Tivo, and don't much care if it isn't or if that's the wrong thing to say. So what? If you say Tivo, everyone knows you mean recordable TV, right? Yeah, so everyone should get it.
We've had ours now for about a year, and have slowly let it change the way we watch anything. For instance, more than not I will wait for a show to be over or at least several minutes running to start watching it, and be able to scan thru the ads. I've also found that some shows I just let run and inhale like any other television, instead of being bothered to FF thru the ads. Our unit has a glitch that makes speeding thru them a pain sometimes anyways, going into loops so it seems like you are FF-ing forever.
What it's great for is getting the two of us together to watch the stuff we like, but lately, especially Mondays, there are so many programs on at one time that even with DVR getting two stations at a time and two different time zones to choose and record from, we have problems.
So tonight I actually had to go downstairs and watch the Cubs game because the unit had to turn to a station to start recording our late run of programs. I can't help but laugh at myself about that. This has to be some milestone.