I used to do these kinds of doodles all the time back when I was in highschool and the earlier years of college (before I took art classes). I would try to imagine a cast of JRPG characters that I would tell a story through, give them amazing fantastical powers, have them have romances with different people in the group, etc.
Now the story is more toned down a bit and turned to one of more of a historical fiction...but I still like to doodle those characters.
I'm way better at doodling girls than guys. However, when it comes to doing a different style of drawing, I can do both equally. And when I'm actually referencing something, it gets better.
Funny how that works.