I requested just species. I didn't request any particular Orchid family (although they did ask if I had any in mind). I let them choose. And they sent me species of all shapes and sizes that would work for my situation. I've got plants growing and blooming I would never think of picking out and ones I have absolutely never heard of till I opened the box and unpacked.
Its taking a chance on what you will get (some need a year to several to bloom and some come in bloom). Want to be adventurous and/or surprised. Kind of a 'go where you've never been before' adventure. Give it a try!
It was a mix. A few seedlings, divisions that need time before blooming which can be 1 to 3 years depending on the variety, divisions that are ready to bloom and I've had some already in bloom.