Bisexual, and I anticipate I always will be though, who knows?
My favorite take on sexual orientation and transition is from Matt Kailey. He distinguished sexual orientation from cultural labels, and identified orientation as towards women, men, both, neither, non-binary people or any possible gender combination. Society labels that as straight, gay, or bi based on your perceived gender, but "straight" or "gay" isn't the orientation itself. Its just a descriptor, a label. Kailey was a "straight" woman who transitioned and became a "gay" man (his own language), but his orientation didn't change-- it was always to men.
Being bi makes the language considerably easier, I have to say.