Positive/Good characteristics to look for:
-If you are physically attracted to him
-If he is physically atracted to you
-Good conversationalist (not a lot of dead spots in the conversation)
-Good listener (if he asks you a question is he really interested and tuned in to your response)
-Good personality (not obnoxious to waiter or waitress; not a constant pessimist; etc.)
-Courteous/Respectful (opens doors for you, waits for you to be seated at table, helps you with your coat, accepts a handshake after first date, doesn't pressure you into something you are not willing to do, doesn't eyeball all the other women that are around)