You will burn through season 1, i sure did.
i lost interest halfway through the shortened season 2/final season. they had to wrap it up the best that could, but it is underwhelming after how good season 1 is.
Jericho is awesome.
There are two aspects to the show:
The first focuses on the interactions between a group of people while they deal with the events going on around them. The first season spends about 50% of it's time on this.
The second focuses on the macro political events that are going on. The first season spends about 50% on this and the second season spends about 85% on it.
Personally, I enjoyed the macro political story lines much more than the human interest story lines, so I really enjoyed season 2, although I agree in that it would have been nice to have it more developed.
Anyway, Jericho is really great and if you enjoy these types of plots then you will like Jericho.