We have a few.
1. Profiles with no pictures, or just pictures of the female half of a couple.
2. People that send you email and don't open their face pictures. We could really care less about seeing pictures of your private parts.
3. People that don't even bother to read your profile before emailing.
4. Single men hiding behind couples profiles.
5. People that don't answer email. How difficult is it to say "You guys are ugly!"
6. People that cancel at the last minute or stand you up. Or email "Wanna fuck tonight!" We have lives and need to make plans in advance.