A lot. These games were specifically designed so that nobody would ever actually be 'finished' with them. You should never be out of things to do in this sort of setting. In Skyrim and FO4, you literally never run out, because there's a system that generates cookie cutter quests in the form of going to a place and killing some dudes that the game can just make more of and assign you again later. But even the full, non generated sidequests are enough to last dozens of hours.

And yeah, I usually play the opposite sex in games. If I'm gonna be staring at someone's ass for hundreds of hours, it's not gonna be a dude's ass.