Oh, I love these things too!
I really find it charming how my girlfriend is generally very skilled at video games. She is especially good at first person shooters. I'm amazed by how flawlessly she can snipe enemies from very far distances, even without a sniper. And I just sit there with a puny pistol and shift awkwardly. xD
She is a huge fan of movies, but her favorites are horror movies and animated shows for younger children. It's a very interesting mix. She has a collection of over 300 horror movies, and also has multiple child-directed movies and animated series, such as the older versions of My Little Pony, Batman, and TMNT.
She's 21 but is a true child at heart. She collects plushies and our living room floor is always littered with them. She also has tons of little figurines, and two kigurumi pajamas. Being so child-like makes her really lively to me. There's never a dull moment with her, because even while I'm resting on the bed, she'll be in the kitchen throwing spaghetti on the ceiling. (True story, it was very fun.)
She's one of the most creative people I know, she has an amazing imagination and loves to express it through amazing arts and cute crafts. She likes to decorate her belongings with lace, swirly silicone, and she'll also add very cute colored beads into it. She also uses baked clay to sculpt her own food, paints it, and uses it for decoration as well. She makes bracelets and draws very often, too.
She also has amazing skills at photography. I have only taken a few photos in my life and she happily taught me how to balance the colors and whatnot. She also taught me how to shade art, both digitally and traditionally.
She is a very quirky person, and that's why I find her so charming.