When you hit on a chick the object is to see if she's compatible and sexually available for you.
The object is not to "make her like you" by showing her that you are a "safe, nice guy".
Hot girls don't get excited or wet from meeting another "safe, nice guy".One Step At A Time
If you are just starting to approach girls or if you have just started approaching girls with a "Filter Them Out" mindset, don't start thinking about screening/filtering just yet. Lower your approach anxiety first. Get comfortable walking up to chicks and talking to them. In order to truly screen and filter out undesirable personality types - you first need to be comfortable with just talking to new girls. Then you can build in some screening material and techniques.
Seriously, don't get too far ahead of yourself, don't take 1 step forward to take 2 steps back.