I liked the unpredictable factor first when they were out in season two, and I seen parts of 3 and more etc...and realised quickly its unpredictable because there is NO story, there is nothing to predict because arent doing zip. They are just winging it on the go just keep the show going for the sake of it (ooh the latino guy escapes there, here, everywhere and NOWHERE at the end...).
Its really weak, and thats why alot of people stopped watching (not only because there is no good story, but because it was too obvious they were just milking it). Which is a shame, because as I said, a character like Michael Scofield is topnotch. He deserves better.