I think the trick is to first get a dog that you don't ever plan on breeding. Join your local GSDCA chapter, and start training/showing in the venue that interests you or best compliments/fits your dog. Going to trials, all breed shows, and more importantly specialty shows will open your eyes to the whole world of dogs and what your chosen breed has to offer. I'll assume that you're talking about breeding GSDs, and so I would really push you towards seeing everything this breed has to offer. Don't sit online and get pushed around by already biased people that have developed their opinions.
Learn about Schutzhund, AKC Obedience, AKC conformation shows, SV style conformation shows, UKC conformation shows, and all the other venues that are available. Start to understand why each "line" looks the way it does, and what each venue looks for in order to succeed. Understand why people breed the way they do and what their goals are. After that, you'll be able to make the decision on what you want to breed for, what venue interests you, and what in your opinion is the correct GSD.
When you get into it, start training, learning, making those connections within the breed, you'll find a good mentor, someone to provide you with a breeding bitch. After you "prove" your love for the breed to someone, and the fact that you are interested in showing/trialing and are committed to it, someone will offer you co-ownership, or the rights to their "pick" pup. You'll get that one, then breed, keep pups back that you think you'll use again, and so a kennel begins.
Try not to form strong opinions before you get true, real life experience with the dogs. Don't go out and about screaming about how this line is sub-par and that line is the greatest. You'll end up putting your foot in your mouth to the wrong people. And as someone that breeds, you really shouldn't have to put down what other people are doing. Just worry about what you're doing and know its better than what's out there.
Last edited by martemchik; 12-28-2013 at 11:44 AM.