To men only, do you not mind she is flat chested?

I would let her fart in my mouth, boobs or no boobs.

I have dated women with small breasts, very large breasts, and everything in between and to be honest, the size does not really matter to me as I would rather have a nice round ass to hold onto during coitus. Gal Gadot is not what would be classified as "flat chested". More appropriate candidates for that title are Keira Knightley, Kate Hudson and/or Lupita Nyong'O.
Even doing a google search of "flat chested actresses" yields no results involving Ms. Gadot.

Now let's see how long it takes before the OP bashes me.

Not at all.
Breasts of all sizes are gorgeous not just larger ones.

Big tits or small tits
It really don't matter
'cause once on their backs
they all get much flatter.

In the end, a guy doesn't really care once he's boinking the woman. Now some guys like large breasted women and some don't, but that is really just something that can attract a guy from afar... And of course the other reality is when you are younger the guy probably likes bigger tits, but that's because the girls are younger, when you are older and have seen what gravity does to larger tits you realize that a happy medium is probably the best for long-term enjoyment.

As for Gadot, she is a bit too flat for my taste, about 1 cup too small... if I met a girl like her in college I wouldn't have been attracted to her, but it wouldn't have been because of her breasts... to my eye her face is too long, mouth is too wide and frankly she just isn't that attractive... of course if she had some major league fun bags I wouldn't have noticed the below average face.

Her chest is just fine; personally, I don't like huge melons on a woman.

Considering that I'm attracted to women of all shapes, thin, chubby, even dare I say fat, I don't care. Gal is an attractive woman.

She's certainly attractive but, personally, she does nothing for me.

I’ve not seen her naked so I can’t really say. She might look great with what she has.