Really I’ve no preference, I enjoy sweet and sour, spicy and mild, pretty equally though if you’re going to force me I’d say I lean towards spicy and since I tolerate it well and it’s not always easy (but getting easier) to find “authentically” seasoned ethnic food so I indulge when it’s available; yes, yes, that’s more of a personal and regional thing than strictly ethnic.
I don’t think my nationality or ancestry affected it so much as my travel and resulting exposure to a very wide variety of foods, particularly asian, at a young age.
Have my tastes changed a lot over my life? I’d say they haven’t changed as much as they’ve grown, there’s a handful of things I liked more when I was younger and don’t really care for now, but now there’s a much broader range of things I consider myself as liking/interested in.