The line between Self Confident and Arrogant is very thin. Perhaps you could specify what you mean by "arrogant"?
That is such a fine line. I find self confidence extremely attractive. Extremely. But arrogance is an immediate and irreversible turn off. To me, arrogance means not just that you think you're better than some, but better than most, if not all. Personally, I think that I'm better than a few others, but grant that even they could be better than me in ways that I can't recognize. If someone is incapable of realizing that possibility, then I just won't respect them.
My other definite turn-offs (of which there are surprisingly few):
*Not listening.
I don't expect much, but please listen, please pay attention, when I'm talking. Yes, it may not be that interesting all the time, and I can understand if I lose you every now and then. But what I'm saying is important to me, otherwise I wouldn't be saying it.
*Guilting and other types of pressure.
Don't. I don't respond well to it. It makes me extremely uncomfortable, and just plain makes me feel bad. You want me to feel bad? Well there you go. Pressure me into doing something. I'll wind up hating you for it. After I spend an inordinate amount of time being angry with myself.
*Lack of consideration.
Take a minute to think of how your words and actions will affect me. I will always do that for you, and would appreciate the same in return. It's a matter of respect.
*Being too clingy/needy.
I need my time, alone. You do too, whether you know it or not. It's healthy, especially in a relationship. Let's go out and do our own thing, have our own experiences that we can then relate to each other. It's necessary. (Also, being "smothered" is the most direct route out of the relationship.)
*Meanness for the sake of meanness.
If you start off the day with 100 I-love-you points, being mean to someone just because you can will drop you down to 0. And not just being mean or cruel to me, being mean to anyone. I don't see the point in it, aside from willfully wanting to hurt someone else, and I just can't stand that.
Those are the big ones. Other things that you guy's have mentioned that I don't think I need to go into:
Dishonesty
Misogyny
Inability to be immature and silly
Oh, and I love hearing my guy's voice in bed. Talk to me baby, it drives me crazy.