I wear all kinds of watches, including open and solid casebacks. I can't say that I have a particular passion for any of them. However, I admit that I perceive the ones with open casebacks as more expert and more exquisite. When you see how the mechanism works, how refined it is, how complex it is, you come to perceive the manufacturer with completely different eyes.
Even if at first you don't really understand anything about the internal mechanism, by the 3rd or 4th watch you end up being able to tell the difference and distinguish which is more refined, which is more complex, etc... that's how you evolve as a connoisseur of watches)