Be aware the initial image. Both he and you will pretend a lot on a first date. Both of you will try to hide the things you dislike about yourselves and that may cloud your judgment.
Keep in mind that physical attraction is important, but not crucial for a long term relationship. And not every romance is like in the movies. You will almost never fall in love with a man on the first date. And if you do, it doesn't last quickly. What for sure is a good sign that you found a man that fits that image is the feeling you get when you go to the bathroom to fix your makeup. If you are feeling excited about getting back to your table, nervous and relaxed at the same time, you usually are seeing his best image, and maybe some of the flaws. It may take a long time to get a complete picture, but make sure you always watch for that feeling.