Kinda hesitant to say 6 since Kinsey pretty much said very few people are totally one way or the other (0 or 6) but uh... I've never felt anything for any actual girls, have loved several guys, and only rarely do I appreciate all parts of a straight mature pic. Yeah, decimals are retarded for this, but somewhere between 5 and 6, closest to 6
Admittingly I'd consider myself a 2, completely comfortable around either gender. However, I'm far too judgmental of males to ever really say I'm into them. As one of the most defining physical attributes I look into is how they keep their hair. If they keep it short, greasy, unkempt, or gelled, I don't look at them any further than being a fellow broski.
I like it most when they've grown it to chin/shoulder length (example (further than shoulder is pushing it)). As well that it blatantly looks clean, which lends me to believe it smells great too. You may ruffle it up and it feels sensational going through your fingers, gotta adore that regardless of gender. I always relate fine kept lengthy hair to having a good hygiene regime, and is probably why I always look at this first.
Interesting enough I rarely run into these individuals, either its a normal short cut or god-awfully long. Ultimately, why I seldom have interest in the same gender.