I have only one, but hung it in my walk-in closet.

choose the one that you feel the closest to and hang it in your bedroom not visible from the door. anyone who gets far enough to see it should know the truth about you anyway, LOL.

you also have my total permission to pitch them. if they were of you with another family member it would be different, you on your own, you get to pick.

Another vote for walk in closet, if space is available.

Like you, I live alone, so I would put one in a hallway, one in my bedroom, and probably the last one in my office.

Do you have a den or home office? I would frame them with non glare glass to keep them nice and hang them there. Doesn't matter that they are of you, they are a gift from your parents. Besides everyday no matter how old you get, you will see yourself as a sweet beautiful girl.

I wonder if you would enjoy these if they were mixed with other images making a gallery wall?

you can put it in your bedroom, they are good reminders of
your childhood so I think it would in your room so well.