For me, there are only a certain set few species that I really want to work with, I have 1 of them. Right now I'm pretty content with the two I have, there are many species I think are amazing but I can't garuntee that I'm going to have the space to provide them with, like a retic, I would never get a female, but maybe a jampea dwarf, but still pushing it. Right now, I got it narrowed down to 5-6 snakes including the two I have, but a Blue Tongue is going to happen. If I ever did get into breeding, it wouldn't be serious, probably hobby breeding.
But don't rush it, I caught the bug when I first got my first snake, and I couldn't wait to get more. Right now, I'm happy with what I have. And as time goes on I'll add to it