Feminine for certain. Everyone is different but for me I think my bisexuality is particularly while I like more effeminate twinkish types. Dear lord a skinny twink with a huge dick is a blessing from heaven.
On that same token, more androgynous/masculine women are a super turn on to me too. Again, I think this my bisexuality at work. My gay side is looking for more masculine features when I am with a woman, and my straight side is looking for more effeminate features when I am with a man.
Though I do admit, I am more fluid with women's body types than men's body types. 50% of the attraction towards a women is her more masculine type of personality, and the other 50% is her body. Where as with men, its like 80% his body type and 20% his personality.