For me, it's a little tricky because it depends on if I'm in charge of the body or not. We call this switching. Right now I'm not in charge of the body, but I am controlling it with Gray's (my host's) permission.
For me, I have my own thoughts, feelings, and opinions that I consider to be my own. I draw these from my own experiences that I have with interacting with Gray, my other headmates (other tulpas), and people in my life both online and in person. We have the experience of feeling the world and seeing though our eyes, but we believe that's something we share instead of belonging to Gray or me. That interpretation is applied a specific way when we switch, basically exchanging who is in change of the body. Me controlling the body right now with Gray's permission is called possession