Also be careful if you were given Gratitude Points Bonus. I received 10000 due to one of their infamous delays just under a year ago. I am now told that they expire in a year regardless of the status of the account. Personally, I find this a ridiculous policy. Points are additive to an account and very different than cash. If they award an arbitrary number of points then it should be additive to my TB account and not have separate status. I don't fly JetBlue enough to gain any really advantage for another year.
Beyond the fact that they were one of the first for inflight personal entertainment, I never did get JetBlue as a FF.