Growing up in a mixed-race household I don't think I experienced much of either culture??? Most of the exposure i've had is through food and even then it's mostly asian foods in general. I guess as a result a lot of my OCs that can cook or are foodies like asian food in one way or another (ex: Jade can cook a lot of noodle-based foods like ramen & vermicelli)
Childhood/background does influence a my story settings & characters a lot though. I live in Massachusetts + I visit Lowel MA and Boston a lot, so when I write cities they're usually based off either of them. I also have 2 characters who live in areas based off places I went to a lot in the past/go to a lot now; Cypress lives in the mountains similar to New Hampshire's white mountains & Valerie lives by the beach (used to go camping a lot in NH + Beaches are a fav. place of mine to go in general).
A lot of my OCs are also in friend groups of some-sort because tbh I actually feel a lot more connected with friends than family (whether or not it's a bad thing I guess it's up to personal views but that's a whole other topic). long story short, the friendships I've made in the past 4 years made a large positive impact on my life so it shows a lot through my characters with most of them either being part of at least one friend circle