Conscious experience as such is an exclusively internal affair: Once all functional properties of your brain are fixed, the character of subjective experience is determined as well.

I believe that if we would carefully apply the distinction between transparency and opacity to the different layers of the human self-model, looking at self-consciousness in a much more careful and fine-grained manner, then we might also arrive at a new answer to your original question: What a "first-person perspective" really is.

The self is not a thing, but a process.

Imagine you are trying to lose weight and attempting to concentrate on writing an article, but there is a bowl with your favorite chocolate cookies in your field of vision, a permanent immoral offer. If we are capable of rejecting such offers or to postpone them into the future, then we can also concentrate on that which we currently want to do.

Conscious experience as such is an exclusively internal affair: Once all functional properties of your brain are fixed, the character of subjective experience is determined as well.

Of course, I strongly sympathized with Habermas and the philosophers representing the Frankfurt school, but I also saw the lack of conceptual clarity, and perceived the not-so-revolutionary self-importance in the epigones of Horkheimer, Adorno, and Habermas.

If we lose the ability in question for a single moment only, we are immediately being hijacked by an aggressive little "Think me!" and our mind begins to wander.