It should be made mandatory to have the basics entered so people can filter properly.
Age, if not filled, people getting passed over
What you are.. Single M, Single F, Couple M/F, Couple M/M ect.. yes I know the options could be endless but I'm not going there about genders..
Your Position should be mandatory, Top, Bottom, Vers.. and add to the options, Depends on partner.

Now I know this one can be a touchy subject, but seperate sex and gender .
Personally, I would like to know if a person was born a male and is gay or bi or a trans woman, non-bin ect..
Height and weight in both metric and imperial.

Yes your programmers would hate to do this, but it would make for a much better application..