I imagine the trinity is a big one also. I know they turn it around and say it's the JW's that are in the dark. I was going to ask what's your best answer as to why you're right, but that might get too long. I have a stack of Watchtower's and Awake's that I haven't read. I could look through them and find out. I'm just too lazy, (and I was told not to read them by Evangelicals).
There are many threads where the Trinity is savaged and its beliefs and uses of the Bible (and the faulty translations and grammatical distortions it relies on). The JWs are not the first to reject the Trinity, neither are they, as many Trinitarians seem to believe, the first to use the "word was a god" translation and things like that. The Trinity was seemingly rejected by early Jewish Christian groups and a few rogue "heretics" throughout history, and the Mormons before them and other splinter groups here and there like the Christadelhians. The Arians particularly had a very close idea of the right concept. The Trinity simply had an appeal to the majority, and the Arian belief persisted even until the 8th century among the Germanics, but it wasn't exactly extinguished by Theological debate.
I recommend the site Examining the Trinity, written by a JW (my friend "Teddy Trueblood"), but remarkably well referenced. It seems that even if the quotes from Trinitarian scholars themselves, traditionalists I've shown this site to reject it merely because it's written by a JW. You will find that when it comes to debating the Trinity, the Trinitarians more often than not engage in widespread fallacious reasoning, dismissal, subject changing, and rejection of views outside of their own conservative scholars, who don't even agree with each other on the specifics. If there's one thing I give the JWs credit for, they do an uncanny job in providing quality scholarship to light regarding the Trinity. The fact that you said you were told not to read them by Evangelicals is further testament to the fact that there is an undeniable attempt to try to "hide the facts", it seems they'd rather have you not see what they have to say at all than be able to read it so you can refute it, there's a reason for that.
Examining the Trinity
Seriously, I love this site so much, I really should give it a donation since I've quoted it and linked to it probably more than any other in my debates against Traditionalist Christians.