It is good at times to know who your partner is. I reqested "anything but bantams". I received eggs that were obviously larger than chicken eggs, but didn't know what they were. So I followed all my clues and found my partner. I sent a pm asking what they were (not specific, just general...
I only offer mixed, so I ask for anything but bantam, since I have standards. I couldn't ask specifically for pure because it isn't fair. If I get pure, great.