The Best of Both Worlds is good. I too couldn't wait to see if Riker and the Enterprise crew really blow up Picard in the Borg ship after Riker says, "Fire!" when that episode was on the first time.
With all that said though, I picked Times Arrow. I liked the time travel aspect and I really thought the actor who played Samuel Clemens did a great job with his characterization!
Of course after that episode we know that Data is walking around with a centuries old head on his shoulders, but otherwise....
