Television "Ongoing" Shows

I just got done watching ER and I wonder one thing. When will some of the shows I watch come to an end? I am trying to kick the habit but it is hard. Every year I refrain from watching new series shows that debut just so I won't get hooked. ER, Alias, 7th Heaven, and West Wing are the shows that remain. I haven't seen Alias in a while so I have given up the new shows and have resorted to buying the seasons on dvd as they come out. This is the last year for 7th Heaven and God knows when for ER. ER is the perfect hospital series, because it will never die. It is a show that you will miss when it is gone but will be happy that you don't have to commit Thursday nights to it anymore. The one show that is ending is probably my favorite series of all time, followed by MASH. That is teh Wetst Wing. This is the last year and I am already going through withdraw. I have auquired the first 5 seasons on dvd and Bravo has been great to show reruns for the last couple of years but it just won't be the same. I was already having theories about who the new President would be even before John Spencer passed away. Now it is worse. I think in the end it will be very possible to see Rob Lowe as "Sam" back for a short role, maybe even as Vice President or President. You would have to remember a specific episode of the President and Sam playing chess to know why I say that. I would vote for him. At least I won't have to get mad at myself for not recording it when I am not going to be home.