I recently found a study comparing dating profiles by sex and preference; while I'm hardly the most deeply involved in GLBT issues, it makes interesting reading for those of us who can be distracted by graphs: http://blog.okcupid.com/index.php/gay-sex-vs-straight-sex/

Much of it was pretty much as anyone would expect; parts, not at all.
 
One thing that blindsided me, and which I'm still trying to understand, is the breakdown of gay-curious people by geographic location.  My home state is flamingly bi-curious!  There are spots all over - there's a very pink area near the Bay Area, for example - but assessed by state, Oregon tops everywhere else in the continental US.  I have no explanation.
 
Memorable quotes: 
    It's like two zen koans, one by Meg Ryan, one by a viking.
    Religion is the opiate of the masses, so long as the masses are straight. However, amass a bunch of lesbians and you're going to need actual drugs.