... Truthfully, I'll pick a dude just about every single time in every game given the choice. BUT, I like the option. It just seems fair. Honestly, for a choose your own adventure, isn't it kind of... geared toward customization so it is, indeed, "your" adventure? Gender is a pretty important detail to some people.
And oh my God, please, don't stick me with a specific love interest. I hate it when an author does that.