When these voices rear their ugly heads, take a deep breath and tell yourself "this is an opportunity I don't want to miss." (There are very effective ways you can learn to manage your gremlins and limiting beliefs. I can help you with that.)
Then look at him again with the kind and wise eyes of a woman working hard to find a good man. Regardless of how you end up judging him, always leave him feeling good about himself—even if you’re not going to see him again. It’s the nice thing to do, and you’ll help prop him up for the next woman who’s going to meet him.
You are looking for a lifetime partner with whom you can share deep connection, unconditional trust, mutual adoration and a lifetime of happiness. Everything you do should be toward that end. Every date is a spectacular opportunity. Don't be a date waster.