It would be a beautiful world if my definitions of too aggressive or too timid were adopted by all. Even better if my mannerisms, expressions, and moods were universally understood.
In the mean time, I'd likely have to stop the guy trying to finger bang me on the dance floor, and then create one of those mental pro/con lists to see if, or where, the interaction would go.
And, because I remember the "affirmative consent" movement, I'd throw the finger banger a certain appreciation for being on that end of the spectrum. If a boy at the other end of the spectrum looked up at me doe-eyed at the end of the night and asked if he could kiss me, or hold my hand, I know there wouldn't be a snow ball's chance in hell he would get a second bite at the apple. We are clearly not a match!