The genres that are available now are the most commonly read ones. Not to mention, some of the genres you've mention could be considered a sub-category of those that are already available so all you'd have to do is look to those to find ones that interest you. And if there are too many genres, it's going to get messy and confusing. So I like it as is.

If it weren't for the gutter, my mind would be homeless.

Quote from redlinks

I know there are already so many genres to select from, but I feel that these should be added to the list as well.

Moe
Gag
4 Koma
Kids

EDIT: and maybe incest should be added as well.

I was just about to suggest incest but you beat me to it.