In that case, I don't see anything wrong that stands out.

Ideally, you should have enough interest in a person to date them. After you learn more about them, your interest should increase... It just sounds like you're going through a normal vetting process.

You may have a smaller pool of things that trigger a development of interest than the average person. Nothing wrong with that. My only comment would be to maybe try exploring more personality types?

Someone else commented that this could be tool for you to seek validation. True. Worth thinking about.

What you don't want to do is settle for someone that you just feel "meh" about. Nothing wrong with seeking someone more appealing to you.