Like Asmo said, the ending was...mediocre. Too many plotholes were left open IMO. I cheered when they revealed Chloe was pregnant (I mean c'mon, after the dizzy spells she had how could you NOT see it coming), but it just seems like they tacked it on at the end to have some type of happy-type element to the ending.
Daniels realizes that there's a difference between being an armchair QB, and actually BEING the QB. Good thing I say, gives him a little humility.
Jack's tantrum against Heller caught me by surprise, to be honest. Again, it just seemed like something that they tacked on at the end.
And talk about an ambiguous final scene...it's like, was Jack gonna jump? Was he gonna go back to CTU or just disappear? WTF? If he does disappear again, will next season be "Mike Doyle's" story?