I loved the first season but, like what will probably be the same for Prison break, these shows just don't know when to quit. The quality has gone down, the major premise of being lost, and everything that made the first season great has given way to boring sub-sub-stories and tiring love affairs. When ever there is something interesting going on (i.e. finding a sealed tunnel), it takes so many episodes to unfold that the suspense, while it may be there, is cheapified into the "bah, now we have to watch another 45 minutes of some random story that isnt that interesting just to come back to that" thought. I tried to watch the entire 2nd season but gave up. There might be some hope in another season, but i doubt it.
I'll probably get flamed now, but its just my opinion.
EDIT: i meant prison break, not jail break.. lol