-Here's the weirdest one: I used to hate the French language (too "mushy"!) and was super excited that my college offered German. I took THREE YEARS of German. Now I've forgotten it all, but I'm really into French and actually considering a French immersion program to get more conversational.
-Also, I used to love loud & stimulating environments (metal shows, night clubs, etc.) while now I appreciate tranquility. Gimme a used bookstore or nature walk any day! I went to a drag brunch recently cause it seemed like the kind of thing I should like as a gay-ish Millennial woman. But it was SO not my thing ... the lights, blaring music, close bodies, and cell phones documenting every second just ruined all the nice/chill things about brunch. And I can't survive an actual concert without earplugs.
-Food-wise, I hated seafood as a kid. Now I love it, including oysters and scallops and octopus and sushi/ceviche of any kind.
May I just say that I love that liking German went with loud environments and metal shows, and liking French went with used book stores and tranquility. It just search so fitting in a way.
As a teen/early 20-something, I had a lot of energy and anger in general, which probably influenced my aesthetic and cultural preferences. Now I'm more chill, more content, but much lower energy.
I still enjoy hard rock & metal, but it's more in a sentimental way, or to have in the background so I clean the bathroom more efficiently ;) I'm not exactly seeking out new bands in that genre.