I sometimes wonder if we worry too much about the "best fit." When I was 17, 18 (or older frankly) I didn't have much of an idea re my future academics/major/career, even though I thought I did. I didn't know if I was better suited for a big school or a small one even though I visited both. Like many college students, I changed my direction once or twice. I'd be a bit concerned if my (excellent student) 16 yo had his studies/career all mapped out at this point (fortunately, no worries there at all -- his eyes quickly glaze over when I ask him to ponder such thoughts).
Seems like there is a good-sized craps-shoot element to all of this which isn't inherently bad.