The site list will constantly change depending on the categories you have selected. Only those sites will be loaded to the submission list which accept submissions for the selected category.

Anyways, here is some quick data for some of the categories you've asked about:

(Since I don't have the necessary post count I can't post direct link to the images).

Selected Categories: Gay, Gay Amateur, Gay Hardcore
Loaded Sites: 157
Image: i55.tinypic.com/t6xqtv.jpg

Selected Categories: Shemale, Tranny, Shemale Hardcore
Loaded Sites: 116
Image: i52.tinypic.com/zstrf9.jpg

Selected Categories: Amateur, Teen, BigTits
Loaded Sites: 200
Image: i51.tinypic.com/4zym2r.jpg

Our tube sites list will constantly change, as sites are added and deleted on a regular basis during database updates.

Hope the above helped. Please let me know if you have any further questions.