If you're replacing "what do you identify as" with

"I'm straight.
I think I'm (mostly) straight.
I don't think I'm (entirely) straight.
Straight? Oh hell no."

I feel that might be a step back. Because defining everything in terms of straight or not is... deceptive. A bisexual would be entirely right to define herself as not straight. But a lesbian (also not straight) would be identifying as a totally different kind of not straight.