That is how I watch most shows! I download, so I have them all on hard drives so if I feel like it I will watch only Stargate for months or Buffy and it is funny as hell. I am told I start to pick up some of the characters little quirks.
At the moment, I am watching Supernatural and have been watching it for the past month. Oh yeah. Favourite phrases? What the hell. Balls. You know what. I guess I've seen them pretty often as my students have started in on watching it too and have started walking around saying, balls.