But for your information harri & torahlishma613, you would be in even better company Davening Nusach Ashkenaz, especially that you grew up with Nusach Ashkenaz, so don’t even contemplate changing Nusach, let alone for actually changing Nussach.
I should also bring to your attention torahlishma613, that just about all the special prayers recited on Rosh haShono are identical in both Nusach Ashkenaz and Sefard, & just about all the differences are within the prayers also recited throughout the year.
So harri:- Retain your loyalty to Nussach Ashkenaz. You will be better off for it.