I honestly can't recall ever specifically targeting artwork of male characters.
![Sweatdrop :sweatdrop](./images/smilies/lkembarrassed.gif)
This is not asking "What is the most common gender on the artwork that you HAVE?" This is asking about the genders of the characters you are/were TRYING to obtain since you started collecting.
I've gotten a few cels of only male characters showing, but I wasn't trying to get those characters specifically. I only got them because they seemed like decent purchases. I guess you could say those purchases were more like decent cels that happened to have male characters on them.