What Nusach should I be davening?

I’m an Ashki with both Chassid and Misnagid ancestors, but about two or three generations back on all sides my family my grandparents and great grandparents went off the derech. Two years ago I became a Ba’al Teshuva and ever since I’ve davened Nusach Ashkenaz and gotten quite used to it. My father also grew up non-religious and had a quick 3-year stint with Chabad where he became a full on Chasid from 16-19, dropping it when he went to university. My dad, because of this, is still into davening Nusach Ari when he does daven, so do I have to take on Nusach Ari or do I just stick with Ashkenaz?