I had the opposite problem. 5 years and a new gender after high school people were recognizing me basically immediately. Like I looked pretty different…

I've come to accept that it's because I have a large and distinct presence, which is a blessing and a curse.

If you're ever interested in developing more presence, try performing the role of yourself. It's the same as being yourself but you ham it up a bit. Exaggerate the fun bits so the audience in the back can see. I noticed I do that instinctively while trying to learn to blend in.

I'm forced to assume that you are now surprisingly attractive, as well. That's the way out goes with the person I never noticed in school.

Of course, part of it might be that my definition of attractive grew up to be a lot healthier than it was when I was a kid.

Did you watch Iron Man 3, too? Just don't go full-Killian.