Definitely not the most influential. However, it is the best and the most grounded in reality. Explored some concepts that portended the 2000's in the US. Terrorism, how far you should go to win a war, etc.
Had a wide range of characters they utilized. I also like the format of the show they used. A lot of time they had the story of 2 characters in one episode. They spent about 25 minutes on the main story from one character's perspective, and then spent about 17 minutes on the other character. It kept things interesting.