When I placed my last order from Maryott's, most were toothy purchases. I told him that toothies were my interest and to choose whatever he would have available for bonus plants and that's exactly what he sent - toothies!
If a seller asks for you to suggest a list for bonus plants, they may not be able to accomodate your wishes, but they will have an idea of what you like and can use that as a guideline.
Usually, instead of offering names, I just mention that I can't do dormants when making suggestions for what I would like as bonus. It has worked well.
