@kittymew just because you like different things doesn’t mean you stopped being you. We grow, we change. Specially with people and experiences around us.
In my opinion who we really are shows by our actions. Deep down , in your heart, you know well what you can and can’t do for example, you know somewhat how your personality works. That is you! (obviously more factors but you get it).
Now if you are talking about liking the same things again is a bit complicated. Since we do change like I mentioned. But you can always try to understand why you liked them in the first placr to get it.
Hope I helped a bit**