Oh, yes... "I'm an honest person", "trust me" or even "believe me, I know..." - anytime self-vouching occurs, I start thinking about what angle is at play there... Self-vouchers make me wary.

That, and constant-smilers. It is my sincere belief that people that constant-smile, no matter what, are deeply damaged in some way.

And low-talkers. Mumblers. High-talkers too. Fast-talkers. Actually, all hominid speech is designed to manipulate, so the moment someone says anything, I assume they are trying to sell me something.

Eye-contact. The lack thereof. Both at the same time; think Marty Feldman. It's better to just walk away, methinks. It is the people themselves that tend to validate my inherent mistrust in strangers.

Why am I talking to all you potential axe-murderers, anyway???

I am going to hide under the bed for the rest of the day.

People don't like me for being honest . Sometimes , it's better to be diplomatic .

This is like a man telling you that he's a "nice guy". If he has to convince you that he's "nice", he's anything but.

Trust your gut.
You'll find it's rarely wrong.

One would hope that the honesty thing was a default position and doesn’t require clarification from the outset!

If you have to think about it, worse yet, announce it, Nope!

Even better ..... Trust me, I am an honest person. It is like two strikes to me.