Gendered behavior in other species is interesting and sheds light on what's going on with us.
Transsexualism and family roles is something I'm into, for obvious reasons.
Comparative analysis of trans civil rights by country might be neat.
Some attempt to figure out prevalence...nevermind. That data is all fungled up and impossible.
Trans people and how we fit in with different religious perspectives could be enjoyable.
Idk but good luck and have fun. I hope you do well.