It seemed like we were finally going to find out all the secrets of Callen's past in the Finale, but I am so glad we didn't. While I think they could do a lot of things better on the show I still thoroughly enjoy it, and Callen is the main reason why. I would have been disappointed if they'd have ended the story arc with this season.
I always saw it as becoming one of the main continuing arcs of the series that will hold it together for seasons to come and I'm glad they didn't ruin it all. They gave us just a bit of information, just enough to make us want more, and I loved it.
What does everyone else think?