Michelle, Dishonesty is the number one trait that will have me running for the hills. I also get wary of people who brag about being honest... a lot. Honest people don't brag about being honest. They just are.
And yes, I know Two Truths is just a game but it's not a game you play with a complete stranger in an online format. There are something like 50 icebreaker questions that are so much better than this one. Yet this is the one I see constantly being chosen. Not sure why people are so intent on tricking others. Oh wait...I do. It's a dating app. That's the whole game.