I feel like I'm "not bi enough to be bi" because when it comes to the same sex I'm only attracted to androgynous girls, as opposed to more feminine looking ones.
Definitely. I get what you're saying, but everybody has a preference, and yours doesn't make you any less bi.
There is a strange idea that being bi means having to be 50/50 for male and female attraction. My view is that you are either 100% straight, 100% gay or anything in between is bi. I am only attracted to men but I'm not attracted to every single man on the planet. That doesn't make me any less gay it just means that I have my 'types' like everyone else. There is no reason that being gay or straight is any better than being bi, so there is no reason to worry about being one or the other. The important thing is that you live your life happy and enjoy all the love you can find.