Yeah, but this should be advice for ANY diversity... Just as some people might say "I'm gay, accept me" people might say "I'm black, accept me."
I would say that the general advice for any diversity is to actually have a good reason to HOW it makes you diverse (other than face value) and WHY this needs to be added to their class. The whole point to increasing diversity is to increase viewpoints and have a more full representation of the society (at least this is what I've understood).
My gay part of the essay spoke about how gays are underrepresented in medicine and through my experiences doctors are atrocious with interacting with those that are different from themselves. I also said that I had an amazing straight doctor. The point to the essay is that by me being gay, I can help my future classmates understand the more proper way to interact with a gay (aka don't assume they all have aids and don't assume they all have the same risk to get HIV, stuff that isn't true). Also, to simply not assume that everyone is straight. More importantly, my experiences have taught me what it's like to be judged and how to form a relationship with someone without doing the same myself.