I tried loads of those hairstyle sites to get an idea about what shape my face even falls into (none of them apparently. ¬.¬), so I could figure out what might suit it. But in the end I think what "suits" a face is only about what expectations people already have.
For my first short haircut ever I took some photos of an androgynous style on two different androgynous looking people, figuring that would be the best approach for now. I don't care if it's what people expect for my face shape (though people who know me as a straight female say it looks good just the same as people who know me as FtM), it just feels hugely liberating!

I'd suggest going for something /you/ like the look of, personally. (:
If you really can't decide, perhaps take a few different pictures and give your hairdresser (If you trust them. I went to a particular guy on a recommendation) the freedom instead, they are trained in knowing what styles will look good on your face!