As a non-JW, these are the things I wonder about:
1. You must listen to the JW message and reject all others. (If everyone believed that, nobody would convert to anything.)
2. Shunning is how you show Christian love towards the sinner.
3. Only the JW have the true message, even though they got it from the Bible just like every Christians out there.
4. You should not pursue a college education.
5. You should believe every literal word out of the Bible, especially any (supposed) hidden meaning in trying to tell us when Jesus will come again.
6. The afterlife of the average saved soul will consist of nothing but gardening, and they will all like it and never get bored.
7. That life for the condemed soul will be eternal sleep.
Sorry, I can only come up with 7, but let me quote Plato in his work The Apology of Socrates:
Let us reflect in another way, and we shall see that there is great reason to hope that death is a good, for one of two things: - either death is a state of nothingness and utter unconsciousness, or, as men say, there is a change and migration of the soul from this world to another. Now if you suppose that there is no consciousness, but a sleep like the sleep of him who is undisturbed even by the sight of dreams, death will be an unspeakable gain. For if a person were to select the night in which his sleep was undisturbed even by dreams, and were to compare with this the other days and nights of his life, and then were to tell us how many days and nights he had passed in the course of his life better and more pleasantly than this one, I think that any man, I will not say a private man, but even the great king, will not find many such days or nights, when compared with the others. Now if death is like this, I say that to die is gain; for eternity is then only a single night. But if death is the journey to another place, and there, as men say, all the dead are, what good, O my friends and judges, can be greater than this? If indeed when the pilgrim arrives in the world below, he is delivered from the professors of justice in this world, and finds the true judges who are said to give judgment there. . . .
The way Plato wrote it, it sounds like eternal rest might be a better alternative to eternal gardening.