For me, the nuttiest JW doctrine is that which teaches that unbaptized people who die before Armageddon with few exceptions, can be expected to be resurrected, whereas they would have died had they lived to see it.
Me too, as above. Totally unjust, what kind of god would determine you faithfulness/unfaithfulness based on what day you died? You die March 1 and Armageddon arrives March 2, bingo! You win. But if Armageddon would have been in February, your dead meat. Yeah right.
Also as mentioned above, the faithful and discreet slave making mistakes yet not really making mistakes and being God's channel of communication on earth and new light yet they don't make mistakes. And never apologize.
Also as mentioned, I found it hypocritical that we'd insist on others taking our literature but would refuse to accept and read other religious literature. I was always curious, and figured that since this was the truth there was nothing to fear from other people's beliefs.
A JW in service once talked rather derisively about a person at the door, a Muslim, who refused literature. I thought to myself that of all people, we should understand that Muslim's viewpoint since it was exactly how we react.
How JWs claim to have love yet on the news you'd see all these other organizations helping out in times of disaster, and not for any ulterior motive like getting Bible studies with them. That was true compassion and love in my mind, doing it because it's the right thing to do.
This list could actually be quite a long one!